Issue:
Bug: Refactor(routing): Fallback to current active routing algorithm



Add connectors from the current active routing algorithm before fallback connectors

Pull request description:
## Type of Change
<!-- Put an `x` in the boxes that apply -->

- [ ] Bugfix
- [ ] New feature
- [ ] Enhancement
- [x] Refactoring
- [ ] Dependency updates
- [ ] Documentation
- [ ] CI/CD

## Description
<!-- Describe your changes in detail -->
This PR modifies critical paths , specifically the `decide_connector` function and the `route_connector_v1_for_payments` function in the payments confirm flow.
These changes are made corresponding to a use case for Narvar. In case the connector specified in straight through routing is not eligible, the connectors configured in the active routing rule by the merchant should be added to the list of connectors before the fallback connectors are added to this list.

### Additional Changes

- [ ] This PR modifies the API contract
- [ ] This PR modifies the database schema
- [ ] This PR modifies application configuration/environment variables

<!--
Provide links to the files with corresponding changes.

Following are the paths where you can find config files:
1. `config`
2. `crates/router/src/configs`
3. `loadtest/config`
-->


## Motivation and Context
<!--
Why is this change required? What problem does it solve?
If it fixes an open issue, please link to the issue here.

If you don't have an issue, we'd recommend starting with one first so the PR
can focus on the implementation (unless it is an obvious bug or documentation fix
that will have little conversation).
-->
This PR closes #7920 

## How did you test it?
<!--
Did you write an integration/unit/API test to verify the code changes?
Or did you test this change manually (provide relevant screenshots)?
-->
Stripe and Adyen created with credit disabled for stripe

1. Payment Connector Create
 - Stripe with credit card disabled
 ```
curl --location 'http://localhost:8080/account/merchant_1747224808/connectors' \
--header 'Content-Type: application/json' \
--header 'Accept: application/json' \
--header 'api-key: dev_sdnmIWRnyDu7lgktwcQ*******' \
--data '{
    "connector_type": "payment_processor",
    "connector_name": "stripe",
    "connector_account_details": {
        "auth_type": "HeaderKey",
        "api_key": "*******",
         },
    "test_mode": true,
    "disabled": false,
    "payment_methods_enabled": [
        {
            "payment_method": "card",
            "payment_method_types": [
                {
                    "payment_method_type": "debit",
                    "card_networks": [
                        "Visa",
                        "Mastercard"
                    ],
                    "minimum_amount": 1,
                    "maximum_amount": 68607706,
                    "recurring_enabled": true,
                    "installment_payment_enabled": true,
                    "accepted_countries": {
                        "type": "disable_only",
                        "list": [
                            "HK"
                        ]
                    },
                    "accepted_currencies": {
                        "type": "enable_only",
                        "list": [
                            "USD",
                            "GBP",
                            "INR"
                        ]
                    }
                }
            ]
        },
        {
            "payment_method": "pay_later",
            "payment_method_types": [
                {
                    "payment_method_type": "klarna",
                    "payment_experience": "redirect_to_url",
                    "minimum_amount": 1,
                    "maximum_amount": 68607706,
                    "recurring_enabled": true,
                    "installment_payment_enabled": true
                },
                {
                    "payment_method_type": "affirm",
                    "payment_experience": "redirect_to_url",
                    "minimum_amount": 1,
                    "maximum_amount": 68607706,
                    "recurring_enabled": true,
                    "installment_payment_enabled": true
                },
                {
                    "payment_method_type": "afterpay_clearpay",
                    "payment_experience": "redirect_to_url",
                    "minimum_amount": 1,
                    "maximum_amount": 68607706,
                    "recurring_enabled": true,
                    "installment_payment_enabled": true
                }
            ]
        }
    ],
    "metadata": {
        "city": "NY",
        "unit": "245"
    },
    "connector_webhook_details": {
        "merchant_secret": "MyWebhookSecret"
    },
    "business_country": "US",
    "business_label": "default"
}'
```
 - Adyen with credit card enabled
 ```
curl --location 'http://localhost:8080/account/merchant_1747224808/connectors' \
--header 'Content-Type: application/json' \
--header 'Accept: application/json' \
--header 'api-key: dev_sdnmIWRnyDu7lgktwcQHoLHEy93541YEgitCw********' \
--data '{
    "connector_type": "payment_processor",
    "connector_name": "adyen",
    "connector_account_details": {
        "auth_type": "SignatureKey",
        "api_key": "AQEqhmfxK43MaR1Hw0m/n3Q5qf3*******",
        "key1": "Jus******",
        "api_secret": "AQEzgmDBbd+uOlwd9********"
    },
    "test_mode": true,
    "disabled": false,
    "payment_methods_enabled": [
        {
            "payment_method": "card",
            "payment_method_types": [
                {
                    "payment_method_type": "credit",
                    "card_networks": [
                        "Visa",
                        "Mastercard"
                    ],
                    "minimum_amount": 1,
                    "maximum_amount": 68607706,
                    "recurring_enabled": true,
                    "installment_payment_enabled": true,
                    "accepted_countries": {
                        "type": "disable_only",
                        "list": [
                            "HK"
                        ]
                    },
                    "accepted_currencies": {
                        "type": "enable_only",
                        "list": [
                            "USD",
                            "GBP",
                            "INR",
                            "AED"
                        ]
                    }
                },
                {
                    "payment_method_type": "debit",
                    "card_networks": [
                        "Visa",
                        "Mastercard"
                    ],
                    "minimum_amount": 1,
                    "maximum_amount": 68607706,
                    "recurring_enabled": true,
                    "installment_payment_enabled": true,
                    "accepted_countries": {
                        "type": "disable_only",
                        "list": [
                            "HK"
                        ]
                    },
                    "accepted_currencies": {
                        "type": "enable_only",
                        "list": [
                            "USD",
                            "GBP",
                            "INR"
                        ]
                    }
                }
            ]
        },
        {
            "payment_method": "pay_later",
            "payment_method_types": [
                {
                    "payment_method_type": "klarna",
                    "payment_experience": "redirect_to_url",
                    "minimum_amount": 1,
                    "maximum_amount": 68607706,
                    "recurring_enabled": true,
                    "installment_payment_enabled": true
                },
                {
                    "payment_method_type": "affirm",
                    "payment_experience": "redirect_to_url",
                    "minimum_amount": 1,
                    "maximum_amount": 68607706,
                    "recurring_enabled": true,
                    "installment_payment_enabled": true
                },
                {
                    "payment_method_type": "afterpay_clearpay",
                    "payment_experience": "redirect_to_url",
                    "minimum_amount": 1,
                    "maximum_amount": 68607706,
                    "recurring_enabled": true,
                    "installment_payment_enabled": true
                }
            ]
        }
    ],
    "metadata": {
        "city": "NY",
        "unit": "245"
    },
    "connector_webhook_details": {
        "merchant_secret": "MyWebhookSecret"
    },
    "business_country": "US",
    "business_label": "default"
}'
```
2. Create Routing Rule
```
curl --location 'http://localhost:8080/routing' \
--header 'Content-Type: application/json' \
--header 'api-key: dev_sdnmIWRnyDu7lgktwcQHoLHEy93541YEgitCwrluXot******' \
--data '{
 "profile_id": "pro_czT9ODMwNqYMmO0Uxnrl",
    "name": "App based",
    "description": "This is a rule based routing created at Wed, 21 Aug 2024 08:28:31 GMT",
    "algorithm": {
        "type": "advanced",
        "data": {
            "defaultSelection": {
                "type": "priority",
                "data": []
            },
            "rules": [
                {
                    "name": "rule_1",
                    "connectorSelection": {
                        "type": "priority",
                        "data": [
                            {
                                "connector": "adyen",
                                "merchant_connector_id": "mca_mduR1DRRqZ9LJQweTxxi"
                            }
                        ]
                    },
                    "statements": [
                        {
                            "condition": [
                                {
                                    "lhs": "metadata",
                                    "comparison": "equal",
                                    "value": {
                                        "type": "metadata_variant",
                                        "value": {
                                            "key": "app",
                                            "value": "a"
                                        }
                                    },
                                    "metadata": {}
                                }
                            ],
                            "nested": null
                        }
                    ]
                }
            ],
            "metadata": {}
        }
    }
}'
```
3. Activate Routing rule
request
```
curl --location --request POST 'http://localhost:8080/routing/routing_X5yMXyw4NPDt91IapIXi/activate' \
--header 'api-key: dev_sdnmIWRnyDu7lgktwcQHoLHEy93541YEgitC****'
```
4. Payments Create
request
```
curl --location 'http://localhost:8080/payments' \
--header 'Content-Type: application/json' \
--header 'Accept: application/json' \
--header 'api-key: dev_sdnmIWRnyDu7lgktwcQHoLHEy93541YEgitC*******' \
--data-raw '{
    "amount": 1000,
    "currency": "USD",
    "amount_to_capture": 1000,
    "confirm": false,
    "profile_id": "pro_czT9ODMwNqYMmO0Uxnrl",
    "capture_method": "automatic",
    "capture_on": "2022-09-10T10:11:12Z",
    "authentication_type": "no_three_ds",
    "setup_future_usage": "on_session", 
    "customer": {
        "id": "customer123",
        "name": "John Doe",
        "email": "customer@gmail.com",
        "phone": "9999999999",
        "phone_country_code": "+1"
    },
    "customer_id": "customer123",
    "phone_country_code": "+1",
    **"routing": {
        "type": "single",
        "data": {
            "connector": "stripe",
            "merchant_connector_id": "mca_Dau6dVR2mgr3oNkNEKXb"
        }
    },**
    "description": "Its my first payment request",
    "return_url": "https://google.com",
    "payment_method": "card",
    "payment_method_type": "credit",
    "payment_method_data": { 
        "card": {
            "card_number": "4242424242424242",
            "card_exp_month": "03",
            "card_exp_year": "30",
            "card_holder_name": "joseph Doe",
            "card_cvc": "123"
        }
    }, 
    "billing": {
        "address": {
            "line1": "1467",
            "line2": "Harrison Street",
            "line3": "Harrison Street",
            "city": "San Fransico",
            "state": "California",
            "zip": "94122",
            "country": "US",
            "first_name": "joseph",
            "last_name": "Doe"
        },
        "phone": {
            "number": "8056594427",
            "country_code": "+91"
        },
        "email": "guest@example.com"
    },
    "shipping": {
        "address": {
            "line1": "1467",
            "line2": "Harrison Street",
            "line3": "Harrison Street",
            "city": "San Fransico",
            "state": "California",
            "zip": "94122",
            "country": "US",
            "first_name": "joseph",
            "last_name": "Doe"
        },
        "phone": {
            "number": "8056594427",
            "country_code": "+91"
        },
        "email": "guest@example.com"
    },
    "statement_descriptor_name": "joseph",
    "statement_descriptor_suffix": "JS",
    "order_details": [
        {
            "product_name": "Apple iphone 15",
            "quantity": 1,
            "amount": 6540,
            "account_name": "transaction_processing"
        }
    ],
    "metadata": {
        "udf1": "value1",
        "new_customer": "true",
        "login_date": "2019-09-10T10:11:12Z"
    },
    "browser_info": {
        "user_agent": "Mozilla\/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit\/537.36 (KHTML, like Gecko) Chrome\/70.0.3538.110 Safari\/537.36",
        "accept_header": "text\/html,application\/xhtml+xml,application\/xml;q=0.9,image\/webp,image\/apng,*\/*;q=0.8",
        "language": "nl-NL",
        "color_depth": 24,
        "screen_height": 723,
        "screen_width": 1536,
        "time_zone": 0,
        "java_enabled": true,
        "java_script_enabled": true,
        "ip_address": "128.0.0.1"
    },
    "customer_acceptance": {
        "acceptance_type": "offline",
        "accepted_at": "1963-05-03T04:07:52.723Z",
        "online": {
            "ip_address": "125.0.0.1",
            "user_agent": "amet irure esse"
        }
    },
    
    "connector_metadata": {
        "noon": {
            "order_category": "pay"
        }
    },
    "payment_link": false,
    "payment_link_config": {
        "theme": "",
        "logo": "",
        "seller_name": "",
        "sdk_layout": "",
        "display_sdk_only": false,
        "enabled_saved_payment_method": false
    },
    "payment_type": "normal", 
    "request_incremental_authorization": false,
    "merchant_order_reference_id": "test_ord",
    "session_expiry": 900   
}'
```
response
```
{
    "payment_id": "pay_BMLwyVUwefqz4mtXqJhK",
    "merchant_id": "merchant_1746679457",
    "status": "requires_confirmation",
    "amount": 1000,
    "net_amount": 1000,
    "shipping_cost": null,
    "amount_capturable": 0,
    "amount_received": null,
    "connector": null,
    "client_secret": "pay_BMLwyVUwefqz*****",
    "created": "2025-05-08T05:31:07.782Z",
    "currency": "USD",
    "customer_id": "customer123",
    "customer": {
        "id": "customer123",
        "name": "John Doe",
        "email": "customer@gmail.com",
        "phone": "9999999999",
        "phone_country_code": "+1"
    },
    .....
```
5. Payments Confirm
request
```
curl --location 'http://localhost:8080/payments/pay_BMLwyVUwefqz4mtXqJhK/confirm' \
--header 'Content-Type: application/json' \
--header 'Accept: application/json' \
--header 'api-key: dev_sdnmIWRnyDu7lgktwcQHoLHE*****' \
--data-raw '{
    "amount": 1000,
    "currency": "USD",
    "amount_to_capture": 1000,
    "confirm": true,
    "profile_id": "pro_czT9ODMwNqYMmO0Uxnrl",
    "capture_method": "automatic",
    "capture_on": "2022-09-10T10:11:12Z",
    "authentication_type": "no_three_ds",
    "setup_future_usage": "on_session", 
    "customer": {
        "id": "customer123",
        "name": "John Doe",
        "email": "customer@gmail.com",
        "phone": "9999999999",
        "phone_country_code": "+1"
    },
    "customer_id": "customer123",
    "phone_country_code": "+1",
    **"routing": {
        "type": "single",
        "data": {
            "connector": "stripe",
            "merchant_connector_id": "mca_Dau6dVR2mgr3oNkNEKXb"
        }
    },**
    "description": "Its my first payment request",
    "return_url": "https://google.com",
    "payment_method": "card",
    "payment_method_type": "credit",
    "payment_method_data": { 
        "card": {
            "card_number": "4242424242424242",
            "card_exp_month": "03",
            "card_exp_year": "30",
            "card_holder_name": "joseph Doe",
            "card_cvc": "123"
        }
    },
    
    "billing": {
        "address": {
            "line1": "1467",
            "line2": "Harrison Street",
            "line3": "Harrison Street",
            "city": "San Fransico",
            "state": "California",
            "zip": "94122",
            "country": "US",
            "first_name": "joseph",
            "last_name": "Doe"
        },
        "phone": {
            "number": "8056594427",
            "country_code": "+91"
        },
        "email": "guest@example.com"
    },
    "shipping": {
        "address": {
            "line1": "1467",
            "line2": "Harrison Street",
            "line3": "Harrison Street",
            "city": "San Fransico",
            "state": "California",
            "zip": "94122",
            "country": "US",
            "first_name": "joseph",
            "last_name": "Doe"
        },
        "phone": {
            "number": "8056594427",
            "country_code": "+91"
        },
        "email": "guest@example.com"
    },
    "statement_descriptor_name": "joseph",
    "statement_descriptor_suffix": "JS",
    "order_details": [
        {
            "product_name": "Apple iphone 15",
            "quantity": 1,
            "amount": 6540,
            "account_name": "transaction_processing"
        }
    ],
    "metadata": {
        "udf1": "value1",
        "new_customer": "true",
        "login_date": "2019-09-10T10:11:12Z"
    },
    "browser_info": {
        "user_agent": "Mozilla\/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit\/537.36 (KHTML, like Gecko) Chrome\/70.0.3538.110 Safari\/537.36",
        "accept_header": "text\/html,application\/xhtml+xml,application\/xml;q=0.9,image\/webp,image\/apng,*\/*;q=0.8",
        "language": "nl-NL",
        "color_depth": 24,
        "screen_height": 723,
        "screen_width": 1536,
        "time_zone": 0,
        "java_enabled": true,
        "java_script_enabled": true,
        "ip_address": "128.0.0.1"
    },
    "customer_acceptance": {
        "acceptance_type": "offline",
        "accepted_at": "1963-05-03T04:07:52.723Z",
        "online": {
            "ip_address": "125.0.0.1",
            "user_agent": "amet irure esse"
        }
    },

    "connector_metadata": {
        "noon": {
            "order_category": "pay"
        }
    },
    "payment_link": false,
    "payment_link_config": {
        "theme": "",
        "logo": "",
        "seller_name": "",
        "sdk_layout": "",
        "display_sdk_only": false,
        "enabled_saved_payment_method": false
    },
    "payment_type": "normal", 
    "request_incremental_authorization": false,
    "merchant_order_reference_id": "test_ord",
    "session_expiry": 900    
}'
```
response
```
{
    "payment_id": "pay_BMLwyVUwefqz4mtXqJhK",
    "merchant_id": "merchant_1746679457",
    "status": "failed",
    "amount": 1000,
    "net_amount": 1000,
    "shipping_cost": null,
    "amount_capturable": 0,
    "amount_received": null,
    "connector": "adyen",
    "client_secret": "pay_BMLwyVUwefqz4mtXqJhK_se******",
    "created": "2025-05-08T05:31:07.782Z",
    "currency": "USD",
    "customer_id": "customer123",
    "customer": {
        "id": "customer123",
        "name": "John Doe",
        "email": "customer@gmail.com",
        "phone": "9999999999",
        "phone_country_code": "+1"
    },
    .
    .
    .
    "error_code": "2",
    "error_message": "Refused",
    "unified_code": "UE_9000",
    "unified_message": "Something went wrong",
    "payment_experience": null,
    "payment_method_type": "credit",
    "connector_label": null,
    .
    .
    .
    "payment_method_id": null,
    "payment_method_status": null,
    "updated": "2025-05-08T05:31:14.287Z",
    "split_payments": null,
    "frm_metadata": null,
    "extended_authorization_applied": null,
    "capture_before": null,
    "merchant_order_reference_id": "test_ord",
    "order_tax_amount": null,
    "connector_mandate_id": null,
    "card_discovery": "manual",
    "force_3ds_challenge": false,
    "force_3ds_challenge_trigger": false,
    "issuer_error_code": null,
    "issuer_error_message": "DECLINED Expiry Incorrect"
}
```
The connector specified in the routing rule was stripe, but the payment was routed to adyen instead since credit was disabled for stripe at the time of payment connector create. The payment failed because the test card details initially added for stripe are not supported by adyen

## Checklist
<!-- Put an `x` in the boxes that apply -->

- [x] I formatted the code `cargo +nightly fmt --all`
- [x] I addressed lints thrown by `cargo clippy`
- [x] I reviewed the submitted code
- [ ] I added unit tests for my changes where possible


Testing:

Stripe and Adyen created with credit disabled for stripe

1. Payment Connector Create
 - Stripe with credit card disabled
 ```
curl --location 'http://localhost:8080/account/merchant_1747224808/connectors' \
--header 'Content-Type: application/json' \
--header 'Accept: application/json' \
--header 'api-key: dev_sdnmIWRnyDu7lgktwcQ*******' \
--data '{
    "connector_type": "payment_processor",
    "connector_name": "stripe",
    "connector_account_details": {
        "auth_type": "HeaderKey",
        "api_key": "*******",
         },
    "test_mode": true,
    "disabled": false,
    "payment_methods_enabled": [
        {
            "payment_method": "card",
            "payment_method_types": [
                {
                    "payment_method_type": "debit",
                    "card_networks": [
                        "Visa",
                        "Mastercard"
                    ],
                    "minimum_amount": 1,
                    "maximum_amount": 68607706,
                    "recurring_enabled": true,
                    "installment_payment_enabled": true,
                    "accepted_countries": {
                        "type": "disable_only",
                        "list": [
                            "HK"
                        ]
                    },
                    "accepted_currencies": {
                        "type": "enable_only",
                        "list": [
                            "USD",
                            "GBP",
                            "INR"
                        ]
                    }
                }
            ]
        },
        {
            "payment_method": "pay_later",
            "payment_method_types": [
                {
                    "payment_method_type": "klarna",
                    "payment_experience": "redirect_to_url",
                    "minimum_amount": 1,
                    "maximum_amount": 68607706,
                    "recurring_enabled": true,
                    "installment_payment_enabled": true
                },
                {
                    "payment_method_type": "affirm",
                    "payment_experience": "redirect_to_url",
                    "minimum_amount": 1,
                    "maximum_amount": 68607706,
                    "recurring_enabled": true,
                    "installment_payment_enabled": true
                },
                {
                    "payment_method_type": "afterpay_clearpay",
                    "payment_experience": "redirect_to_url",
                    "minimum_amount": 1,
                    "maximum_amount": 68607706,
                    "recurring_enabled": true,
                    "installment_payment_enabled": true
                }
            ]
        }
    ],
    "metadata": {
        "city": "NY",
        "unit": "245"
    },
    "connector_webhook_details": {
        "merchant_secret": "MyWebhookSecret"
    },
    "business_country": "US",
    "business_label": "default"
}'
```
 - Adyen with credit card enabled
 ```
curl --location 'http://localhost:8080/account/merchant_1747224808/connectors' \
--header 'Content-Type: application/json' \
--header 'Accept: application/json' \
--header 'api-key: dev_sdnmIWRnyDu7lgktwcQHoLHEy93541YEgitCw********' \
--data '{
    "connector_type": "payment_processor",
    "connector_name": "adyen",
    "connector_account_details": {
        "auth_type": "SignatureKey",
        "api_key": "AQEqhmfxK43MaR1Hw0m/n3Q5qf3*******",
        "key1": "Jus******",
        "api_secret": "AQEzgmDBbd+uOlwd9********"
    },
    "test_mode": true,
    "disabled": false,
    "payment_methods_enabled": [
        {
            "payment_method": "card",
            "payment_method_types": [
                {
                    "payment_method_type": "credit",
                    "card_networks": [
                        "Visa",
                        "Mastercard"
                    ],
                    "minimum_amount": 1,
                    "maximum_amount": 68607706,
                    "recurring_enabled": true,
                    "installment_payment_enabled": true,
                    "accepted_countries": {
                        "type": "disable_only",
                        "list": [
                            "HK"
                        ]
                    },
                    "accepted_currencies": {
                        "type": "enable_only",
                        "list": [
                            "USD",
                            "GBP",
                            "INR",
                            "AED"
                        ]
                    }
                },
                {
                    "payment_method_type": "debit",
                    "card_networks": [
                        "Visa",
                        "Mastercard"
                    ],
                    "minimum_amount": 1,
                    "maximum_amount": 68607706,
                    "recurring_enabled": true,
                    "installment_payment_enabled": true,
                    "accepted_countries": {
                        "type": "disable_only",
                        "list": [
                            "HK"
                        ]
                    },
                    "accepted_currencies": {
                        "type": "enable_only",
                        "list": [
                            "USD",
                            "GBP",
                            "INR"
                        ]
                    }
                }
            ]
        },
        {
            "payment_method": "pay_later",
            "payment_method_types": [
                {
                    "payment_method_type": "klarna",
                    "payment_experience": "redirect_to_url",
                    "minimum_amount": 1,
                    "maximum_amount": 68607706,
                    "recurring_enabled": true,
                    "installment_payment_enabled": true
                },
                {
                    "payment_method_type": "affirm",
                    "payment_experience": "redirect_to_url",
                    "minimum_amount": 1,
                    "maximum_amount": 68607706,
                    "recurring_enabled": true,
                    "installment_payment_enabled": true
                },
                {
                    "payment_method_type": "afterpay_clearpay",
                    "payment_experience": "redirect_to_url",
                    "minimum_amount": 1,
                    "maximum_amount": 68607706,
                    "recurring_enabled": true,
                    "installment_payment_enabled": true
                }
            ]
        }
    ],
    "metadata": {
        "city": "NY",
        "unit": "245"
    },
    "connector_webhook_details": {
        "merchant_secret": "MyWebhookSecret"
    },
    "business_country": "US",
    "business_label": "default"
}'
```
2. Create Routing Rule
```
curl --location 'http://localhost:8080/routing' \
--header 'Content-Type: application/json' \
--header 'api-key: dev_sdnmIWRnyDu7lgktwcQHoLHEy93541YEgitCwrluXot******' \
--data '{
 "profile_id": "pro_czT9ODMwNqYMmO0Uxnrl",
    "name": "App based",
    "description": "This is a rule based routing created at Wed, 21 Aug 2024 08:28:31 GMT",
    "algorithm": {
        "type": "advanced",
        "data": {
            "defaultSelection": {
                "type": "priority",
                "data": []
            },
            "rules": [
                {
                    "name": "rule_1",
                    "connectorSelection": {
                        "type": "priority",
                        "data": [
                            {
                                "connector": "adyen",
                                "merchant_connector_id": "mca_mduR1DRRqZ9LJQweTxxi"
                            }
                        ]
                    },
                    "statements": [
                        {
                            "condition": [
                                {
                                    "lhs": "metadata",
                                    "comparison": "equal",
                                    "value": {
                                        "type": "metadata_variant",
                                        "value": {
                                            "key": "app",
                                            "value": "a"
                                        }
                                    },
                                    "metadata": {}
                                }
                            ],
                            "nested": null
                        }
                    ]
                }
            ],
            "metadata": {}
        }
    }
}'
```
3. Activate Routing rule
request
```
curl --location --request POST 'http://localhost:8080/routing/routing_X5yMXyw4NPDt91IapIXi/activate' \
--header 'api-key: dev_sdnmIWRnyDu7lgktwcQHoLHEy93541YEgitC****'
```
4. Payments Create
request
```
curl --location 'http://localhost:8080/payments' \
--header 'Content-Type: application/json' \
--header 'Accept: application/json' \
--header 'api-key: dev_sdnmIWRnyDu7lgktwcQHoLHEy93541YEgitC*******' \
--data-raw '{
    "amount": 1000,
    "currency": "USD",
    "amount_to_capture": 1000,
    "confirm": false,
    "profile_id": "pro_czT9ODMwNqYMmO0Uxnrl",
    "capture_method": "automatic",
    "capture_on": "2022-09-10T10:11:12Z",
    "authentication_type": "no_three_ds",
    "setup_future_usage": "on_session", 
    "customer": {
        "id": "customer123",
        "name": "John Doe",
        "email": "customer@gmail.com",
        "phone": "9999999999",
        "phone_country_code": "+1"
    },
    "customer_id": "customer123",
    "phone_country_code": "+1",
    **"routing": {
        "type": "single",
        "data": {
            "connector": "stripe",
            "merchant_connector_id": "mca_Dau6dVR2mgr3oNkNEKXb"
        }
    },**
    "description": "Its my first payment request",
    "return_url": "https://google.com",
    "payment_method": "card",
    "payment_method_type": "credit",
    "payment_method_data": { 
        "card": {
            "card_number": "4242424242424242",
            "card_exp_month": "03",
            "card_exp_year": "30",
            "card_holder_name": "joseph Doe",
            "card_cvc": "123"
        }
    }, 
    "billing": {
        "address": {
            "line1": "1467",
            "line2": "Harrison Street",
            "line3": "Harrison Street",
            "city": "San Fransico",
            "state": "California",
            "zip": "94122",
            "country": "US",
            "first_name": "joseph",
            "last_name": "Doe"
        },
        "phone": {
            "number": "8056594427",
            "country_code": "+91"
        },
        "email": "guest@example.com"
    },
    "shipping": {
        "address": {
            "line1": "1467",
            "line2": "Harrison Street",
            "line3": "Harrison Street",
            "city": "San Fransico",
            "state": "California",
            "zip": "94122",
            "country": "US",
            "first_name": "joseph",
            "last_name": "Doe"
        },
        "phone": {
            "number": "8056594427",
            "country_code": "+91"
        },
        "email": "guest@example.com"
    },
    "statement_descriptor_name": "joseph",
    "statement_descriptor_suffix": "JS",
    "order_details": [
        {
            "product_name": "Apple iphone 15",
            "quantity": 1,
            "amount": 6540,
            "account_name": "transaction_processing"
        }
    ],
    "metadata": {
        "udf1": "value1",
        "new_customer": "true",
        "login_date": "2019-09-10T10:11:12Z"
    },
    "browser_info": {
        "user_agent": "Mozilla\/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit\/537.36 (KHTML, like Gecko) Chrome\/70.0.3538.110 Safari\/537.36",
        "accept_header": "text\/html,application\/xhtml+xml,application\/xml;q=0.9,image\/webp,image\/apng,*\/*;q=0.8",
        "language": "nl-NL",
        "color_depth": 24,
        "screen_height": 723,
        "screen_width": 1536,
        "time_zone": 0,
        "java_enabled": true,
        "java_script_enabled": true,
        "ip_address": "128.0.0.1"
    },
    "customer_acceptance": {
        "acceptance_type": "offline",
        "accepted_at": "1963-05-03T04:07:52.723Z",
        "online": {
            "ip_address": "125.0.0.1",
            "user_agent": "amet irure esse"
        }
    },
    
    "connector_metadata": {
        "noon": {
            "order_category": "pay"
        }
    },
    "payment_link": false,
    "payment_link_config": {
        "theme": "",
        "logo": "",
        "seller_name": "",
        "sdk_layout": "",
        "display_sdk_only": false,
        "enabled_saved_payment_method": false
    },
    "payment_type": "normal", 
    "request_incremental_authorization": false,
    "merchant_order_reference_id": "test_ord",
    "session_expiry": 900   
}'
```
response
```
{
    "payment_id": "pay_BMLwyVUwefqz4mtXqJhK",
    "merchant_id": "merchant_1746679457",
    "status": "requires_confirmation",
    "amount": 1000,
    "net_amount": 1000,
    "shipping_cost": null,
    "amount_capturable": 0,
    "amount_received": null,
    "connector": null,
    "client_secret": "pay_BMLwyVUwefqz*****",
    "created": "2025-05-08T05:31:07.782Z",
    "currency": "USD",
    "customer_id": "customer123",
    "customer": {
        "id": "customer123",
        "name": "John Doe",
        "email": "customer@gmail.com",
        "phone": "9999999999",
        "phone_country_code": "+1"
    },
    .....
```
5. Payments Confirm
request
```
curl --location 'http://localhost:8080/payments/pay_BMLwyVUwefqz4mtXqJhK/confirm' \
--header 'Content-Type: application/json' \
--header 'Accept: application/json' \
--header 'api-key: dev_sdnmIWRnyDu7lgktwcQHoLHE*****' \
--data-raw '{
    "amount": 1000,
    "currency": "USD",
    "amount_to_capture": 1000,
    "confirm": true,
    "profile_id": "pro_czT9ODMwNqYMmO0Uxnrl",
    "capture_method": "automatic",
    "capture_on": "2022-09-10T10:11:12Z",
    "authentication_type": "no_three_ds",
    "setup_future_usage": "on_session", 
    "customer": {
        "id": "customer123",
        "name": "John Doe",
        "email": "customer@gmail.com",
        "phone": "9999999999",
        "phone_country_code": "+1"
    },
    "customer_id": "customer123",
    "phone_country_code": "+1",
    **"routing": {
        "type": "single",
        "data": {
            "connector": "stripe",
            "merchant_connector_id": "mca_Dau6dVR2mgr3oNkNEKXb"
        }
    },**
    "description": "Its my first payment request",
    "return_url": "https://google.com",
    "payment_method": "card",
    "payment_method_type": "credit",
    "payment_method_data": { 
        "card": {
            "card_number": "4242424242424242",
            "card_exp_month": "03",
            "card_exp_year": "30",
            "card_holder_name": "joseph Doe",
            "card_cvc": "123"
        }
    },
    
    "billing": {
        "address": {
            "line1": "1467",
            "line2": "Harrison Street",
            "line3": "Harrison Street",
            "city": "San Fransico",
            "state": "California",
            "zip": "94122",
            "country": "US",
            "first_name": "joseph",
            "last_name": "Doe"
        },
        "phone": {
            "number": "8056594427",
            "country_code": "+91"
        },
        "email": "guest@example.com"
    },
    "shipping": {
        "address": {
            "line1": "1467",
            "line2": "Harrison Street",
            "line3": "Harrison Street",
            "city": "San Fransico",
            "state": "California",
            "zip": "94122",
            "country": "US",
            "first_name": "joseph",
            "last_name": "Doe"
        },
        "phone": {
            "number": "8056594427",
            "country_code": "+91"
        },
        "email": "guest@example.com"
    },
    "statement_descriptor_name": "joseph",
    "statement_descriptor_suffix": "JS",
    "order_details": [
        {
            "product_name": "Apple iphone 15",
            "quantity": 1,
            "amount": 6540,
            "account_name": "transaction_processing"
        }
    ],
    "metadata": {
        "udf1": "value1",
        "new_customer": "true",
        "login_date": "2019-09-10T10:11:12Z"
    },
    "browser_info": {
        "user_agent": "Mozilla\/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit\/537.36 (KHTML, like Gecko) Chrome\/70.0.3538.110 Safari\/537.36",
        "accept_header": "text\/html,application\/xhtml+xml,application\/xml;q=0.9,image\/webp,image\/apng,*\/*;q=0.8",
        "language": "nl-NL",
        "color_depth": 24,
        "screen_height": 723,
        "screen_width": 1536,
        "time_zone": 0,
        "java_enabled": true,
        "java_script_enabled": true,
        "ip_address": "128.0.0.1"
    },
    "customer_acceptance": {
        "acceptance_type": "offline",
        "accepted_at": "1963-05-03T04:07:52.723Z",
        "online": {
            "ip_address": "125.0.0.1",
            "user_agent": "amet irure esse"
        }
    },

    "connector_metadata": {
        "noon": {
            "order_category": "pay"
        }
    },
    "payment_link": false,
    "payment_link_config": {
        "theme": "",
        "logo": "",
        "seller_name": "",
        "sdk_layout": "",
        "display_sdk_only": false,
        "enabled_saved_payment_method": false
    },
    "payment_type": "normal", 
    "request_incremental_authorization": false,
    "merchant_order_reference_id": "test_ord",
    "session_expiry": 900    
}'
```
response
```
{
    "payment_id": "pay_BMLwyVUwefqz4mtXqJhK",
    "merchant_id": "merchant_1746679457",
    "status": "failed",
    "amount": 1000,
    "net_amount": 1000,
    "shipping_cost": null,
    "amount_capturable": 0,
    "amount_received": null,
    "connector": "adyen",
    "client_secret": "pay_BMLwyVUwefqz4mtXqJhK_se******",
    "created": "2025-05-08T05:31:07.782Z",
    "currency": "USD",
    "customer_id": "customer123",
    "customer": {
        "id": "customer123",
        "name": "John Doe",
        "email": "customer@gmail.com",
        "phone": "9999999999",
        "phone_country_code": "+1"
    },
    .
    .
    .
    "error_code": "2",
    "error_message": "Refused",
    "unified_code": "UE_9000",
    "unified_message": "Something went wrong",
    "payment_experience": null,
    "payment_method_type": "credit",
    "connector_label": null,
    .
    .
    .
    "payment_method_id": null,
    "payment_method_status": null,
    "updated": "2025-05-08T05:31:14.287Z",
    "split_payments": null,
    "frm_metadata": null,
    "extended_authorization_applied": null,
    "capture_before": null,
    "merchant_order_reference_id": "test_ord",
    "order_tax_amount": null,
    "connector_mandate_id": null,
    "card_discovery": "manual",
    "force_3ds_challenge": false,
    "force_3ds_challenge_trigger": false,
    "issuer_error_code": null,
    "issuer_error_message": "DECLINED Expiry Incorrect"
}
```
The connector specified in the routing rule was stripe, but the payment was routed to adyen instead since credit was disabled for stripe at the time of payment connector create. The payment failed because the test card details initially added for stripe are not supported by adyen

Patch:
diff --git a/crates/router/src/core/payments.rs b/crates/router/src/core/payments.rs
index 1b7249cfa44..1c0dd9a3499 100644
--- a/crates/router/src/core/payments.rs
+++ b/crates/router/src/core/payments.rs
@@ -6475,7 +6475,7 @@ where
     }
 
     if let Some(routing_algorithm) = request_straight_through {
-        let (mut connectors, check_eligibility) = routing::perform_straight_through_routing(
+        let (connectors, check_eligibility) = routing::perform_straight_through_routing(
             &routing_algorithm,
             payment_data.get_creds_identifier(),
         )
@@ -6483,57 +6483,34 @@ where
         .attach_printable("Failed execution of straight through routing")?;
 
         if check_eligibility {
+            let new_pd = payment_data.clone();
             let transaction_data = core_routing::PaymentsDslInput::new(
-                payment_data.get_setup_mandate(),
-                payment_data.get_payment_attempt(),
-                payment_data.get_payment_intent(),
-                payment_data.get_payment_method_data(),
-                payment_data.get_address(),
-                payment_data.get_recurring_details(),
-                payment_data.get_currency(),
+                new_pd.get_setup_mandate(),
+                new_pd.get_payment_attempt(),
+                new_pd.get_payment_intent(),
+                new_pd.get_payment_method_data(),
+                new_pd.get_address(),
+                new_pd.get_recurring_details(),
+                new_pd.get_currency(),
             );
 
-            connectors = routing::perform_eligibility_analysis_with_fallback(
-                &state.clone(),
-                merchant_context.get_merchant_key_store(),
-                connectors,
-                &TransactionData::Payment(transaction_data),
-                eligible_connectors,
+            return route_connector_v1_for_payments(
+                &state,
+                merchant_context,
                 business_profile,
+                payment_data,
+                transaction_data,
+                routing_data,
+                eligible_connectors,
+                mandate_type,
+                Some(connectors),
             )
-            .await
-            .change_context(errors::ApiErrorResponse::InternalServerError)
-            .attach_printable("failed eligibility analysis and fallback")?;
+            .await;
         }
-
-        let connector_data = connectors
-            .into_iter()
-            .map(|conn| {
-                api::ConnectorData::get_connector_by_name(
-                    &state.conf.connectors,
-                    &conn.connector.to_string(),
-                    api::GetToken::Connector,
-                    conn.merchant_connector_id.clone(),
-                )
-            })
-            .collect::<CustomResult<Vec<_>, _>>()
-            .change_context(errors::ApiErrorResponse::InternalServerError)
-            .attach_printable("Invalid connector name received")?;
-
-        return decide_multiplex_connector_for_normal_or_recurring_payment(
-            &state,
-            payment_data,
-            routing_data,
-            connector_data,
-            mandate_type,
-            business_profile.is_connector_agnostic_mit_enabled,
-            business_profile.is_network_tokenization_enabled,
-        )
-        .await;
     }
 
     if let Some(ref routing_algorithm) = routing_data.routing_info.algorithm {
-        let (mut connectors, check_eligibility) = routing::perform_straight_through_routing(
+        let (connectors, check_eligibility) = routing::perform_straight_through_routing(
             routing_algorithm,
             payment_data.get_creds_identifier(),
         )
@@ -6541,53 +6518,30 @@ where
         .attach_printable("Failed execution of straight through routing")?;
 
         if check_eligibility {
+            let new_pd = payment_data.clone();
             let transaction_data = core_routing::PaymentsDslInput::new(
-                payment_data.get_setup_mandate(),
-                payment_data.get_payment_attempt(),
-                payment_data.get_payment_intent(),
-                payment_data.get_payment_method_data(),
-                payment_data.get_address(),
-                payment_data.get_recurring_details(),
-                payment_data.get_currency(),
+                new_pd.get_setup_mandate(),
+                new_pd.get_payment_attempt(),
+                new_pd.get_payment_intent(),
+                new_pd.get_payment_method_data(),
+                new_pd.get_address(),
+                new_pd.get_recurring_details(),
+                new_pd.get_currency(),
             );
 
-            connectors = routing::perform_eligibility_analysis_with_fallback(
+            return route_connector_v1_for_payments(
                 &state,
-                merchant_context.get_merchant_key_store(),
-                connectors,
-                &TransactionData::Payment(transaction_data),
-                eligible_connectors,
+                merchant_context,
                 business_profile,
+                payment_data,
+                transaction_data,
+                routing_data,
+                eligible_connectors,
+                mandate_type,
+                Some(connectors),
             )
-            .await
-            .change_context(errors::ApiErrorResponse::InternalServerError)
-            .attach_printable("failed eligibility analysis and fallback")?;
+            .await;
         }
-
-        let connector_data = connectors
-            .into_iter()
-            .map(|conn| {
-                api::ConnectorData::get_connector_by_name(
-                    &state.conf.connectors,
-                    &conn.connector.to_string(),
-                    api::GetToken::Connector,
-                    conn.merchant_connector_id,
-                )
-            })
-            .collect::<CustomResult<Vec<_>, _>>()
-            .change_context(errors::ApiErrorResponse::InternalServerError)
-            .attach_printable("Invalid connector name received")?;
-
-        return decide_multiplex_connector_for_normal_or_recurring_payment(
-            &state,
-            payment_data,
-            routing_data,
-            connector_data,
-            mandate_type,
-            business_profile.is_connector_agnostic_mit_enabled,
-            business_profile.is_network_tokenization_enabled,
-        )
-        .await;
     }
 
     let new_pd = payment_data.clone();
@@ -6610,6 +6564,7 @@ where
         routing_data,
         eligible_connectors,
         mandate_type,
+        None,
     )
     .await
 }
@@ -7173,6 +7128,7 @@ pub async fn route_connector_v1_for_payments<F, D>(
     routing_data: &mut storage::RoutingData,
     eligible_connectors: Option<Vec<enums::RoutableConnectors>>,
     mandate_type: Option<api::MandateTransactionType>,
+    connector_list: Option<Vec<api_models::routing::RoutableConnectorChoice>>,
 ) -> RouterResult<ConnectorCallType>
 where
     F: Send + Clone,
@@ -7190,7 +7146,7 @@ where
         algorithm_ref.algorithm_id
     };
 
-    let connectors = routing::perform_static_routing_v1(
+    let mut connectors = routing::perform_static_routing_v1(
         state,
         merchant_context.get_merchant_account().get_id(),
         routing_algorithm_id.as_ref(),
@@ -7200,10 +7156,20 @@ where
     .await
     .change_context(errors::ApiErrorResponse::InternalServerError)?;
 
+    // adds straight through connectors to the list of connectors in the active routing algorithm
+    // and perform eligibility analysis on the combined set of connectors
+
+    connectors = connector_list
+        .map(|mut straight_through_connectors| {
+            straight_through_connectors.extend(connectors.clone());
+            straight_through_connectors
+        })
+        .unwrap_or_else(|| connectors);
+
     #[cfg(all(feature = "v1", feature = "dynamic_routing"))]
     let payment_attempt = transaction_data.payment_attempt.clone();
 
-    let connectors = routing::perform_eligibility_analysis_with_fallback(
+    connectors = routing::perform_eligibility_analysis_with_fallback(
         &state.clone(),
         merchant_context.get_merchant_key_store(),
         connectors,
@@ -7385,7 +7351,6 @@ pub async fn route_connector_v1_for_payouts(
     .await
     .change_context(errors::ApiErrorResponse::InternalServerError)
     .attach_printable("failed eligibility analysis and fallback")?;
-
     let first_connector_choice = connectors
         .first()
         .ok_or(errors::ApiErrorResponse::IncorrectPaymentMethodConfiguration)