Issue:
Bug: feat(router): Include `payment_experience` in PML for payments response (v2)



Required by SDK

Pull request description:
## Type of Change
<!-- Put an `x` in the boxes that apply -->

- [ ] Bugfix
- [x] New feature
- [ ] Enhancement
- [ ] Refactoring
- [ ] Dependency updates
- [ ] Documentation
- [ ] CI/CD

## Description
<!-- Describe your changes in detail -->
Added `payment_experience` in Payment Method List for Payments Response

### Additional Changes

- [x] 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).
-->
Closes #8254 


## 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)?
-->

Request:

```
curl --location 'http://localhost:8080/v2/payments/12345_pay_019740919d6a72c2b6984f9b99be203f/payment-methods' \
--header 'Content-Type: application/json' \
--header 'x-profile-id: pro_GKx8bxieFB51Nk5FMCi6' \
--header 'Authorization: publishable-key=pk_dev_e2eec08c40444d8e862c444d3df67cd2,client-secret=cs_019740919d817810ad313fce9534793e' \
--header 'api-key: pk_dev_e2eec08c40444d8e862c444d3df67cd2'
```

Response:
```json
{
    "payment_methods_enabled": [
        {
            "payment_method_type": "card_redirect",
            "payment_method_subtype": "card_redirect",
            "payment_experience": "redirect_to_url",
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "card",
            "payment_method_subtype": "card",
            "payment_experience": null,
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "wallet",
            "payment_method_subtype": "google_pay",
            "payment_experience": null,
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "wallet",
            "payment_method_subtype": "apple_pay",
            "payment_experience": null,
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "wallet",
            "payment_method_subtype": "we_chat_pay",
            "payment_experience": null,
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "wallet",
            "payment_method_subtype": "ali_pay",
            "payment_experience": null,
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "wallet",
            "payment_method_subtype": "paypal",
            "payment_experience": null,
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "wallet",
            "payment_method_subtype": "mb_way",
            "payment_experience": null,
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "pay_later",
            "payment_method_subtype": "klarna",
            "payment_experience": "redirect_to_url",
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "pay_later",
            "payment_method_subtype": "affirm",
            "payment_experience": "redirect_to_url",
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "pay_later",
            "payment_method_subtype": "afterpay_clearpay",
            "payment_experience": "redirect_to_url",
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "pay_later",
            "payment_method_subtype": "walley",
            "payment_experience": "redirect_to_url",
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "bank_redirect",
            "payment_method_subtype": "giropay",
            "payment_experience": "redirect_to_url",
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "bank_redirect",
            "payment_method_subtype": "ideal",
            "payment_experience": "redirect_to_url",
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "bank_redirect",
            "payment_method_subtype": "eps",
            "payment_experience": "redirect_to_url",
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "bank_redirect",
            "payment_method_subtype": "bancontact_card",
            "payment_experience": "redirect_to_url",
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "bank_redirect",
            "payment_method_subtype": "przelewy24",
            "payment_experience": "redirect_to_url",
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "bank_redirect",
            "payment_method_subtype": "sofort",
            "payment_experience": "redirect_to_url",
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "bank_redirect",
            "payment_method_subtype": "blik",
            "payment_experience": "redirect_to_url",
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "bank_redirect",
            "payment_method_subtype": "trustly",
            "payment_experience": "redirect_to_url",
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "bank_redirect",
            "payment_method_subtype": "online_banking_finland",
            "payment_experience": "redirect_to_url",
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "bank_redirect",
            "payment_method_subtype": "online_banking_poland",
            "payment_experience": "redirect_to_url",
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "bank_transfer",
            "payment_method_subtype": "ach",
            "payment_experience": "redirect_to_url",
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "bank_transfer",
            "payment_method_subtype": "sepa",
            "payment_experience": "redirect_to_url",
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "bank_transfer",
            "payment_method_subtype": "bacs",
            "payment_experience": "redirect_to_url",
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "bank_debit",
            "payment_method_subtype": "ach",
            "payment_experience": null,
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "bank_debit",
            "payment_method_subtype": "sepa",
            "payment_experience": null,
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "bank_debit",
            "payment_method_subtype": "bacs",
            "payment_experience": null,
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "bank_debit",
            "payment_method_subtype": "becs",
            "payment_experience": null,
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "pay_later",
            "payment_method_subtype": "klarna",
            "payment_experience": "invoke_sdk_client",
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "pay_later",
            "payment_method_subtype": "klarna",
            "payment_experience": "redirect_to_url",
            "required_fields": null,
            "surcharge_details": null
        }
    ],
    "customer_payment_methods": null
}
```

## 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`
- [ ] I reviewed the submitted code
- [ ] I added unit tests for my changes where possible


Testing:


Request:

```
curl --location 'http://localhost:8080/v2/payments/12345_pay_019740919d6a72c2b6984f9b99be203f/payment-methods' \
--header 'Content-Type: application/json' \
--header 'x-profile-id: pro_GKx8bxieFB51Nk5FMCi6' \
--header 'Authorization: publishable-key=pk_dev_e2eec08c40444d8e862c444d3df67cd2,client-secret=cs_019740919d817810ad313fce9534793e' \
--header 'api-key: pk_dev_e2eec08c40444d8e862c444d3df67cd2'
```

Response:
```json
{
    "payment_methods_enabled": [
        {
            "payment_method_type": "card_redirect",
            "payment_method_subtype": "card_redirect",
            "payment_experience": "redirect_to_url",
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "card",
            "payment_method_subtype": "card",
            "payment_experience": null,
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "wallet",
            "payment_method_subtype": "google_pay",
            "payment_experience": null,
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "wallet",
            "payment_method_subtype": "apple_pay",
            "payment_experience": null,
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "wallet",
            "payment_method_subtype": "we_chat_pay",
            "payment_experience": null,
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "wallet",
            "payment_method_subtype": "ali_pay",
            "payment_experience": null,
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "wallet",
            "payment_method_subtype": "paypal",
            "payment_experience": null,
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "wallet",
            "payment_method_subtype": "mb_way",
            "payment_experience": null,
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "pay_later",
            "payment_method_subtype": "klarna",
            "payment_experience": "redirect_to_url",
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "pay_later",
            "payment_method_subtype": "affirm",
            "payment_experience": "redirect_to_url",
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "pay_later",
            "payment_method_subtype": "afterpay_clearpay",
            "payment_experience": "redirect_to_url",
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "pay_later",
            "payment_method_subtype": "walley",
            "payment_experience": "redirect_to_url",
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "bank_redirect",
            "payment_method_subtype": "giropay",
            "payment_experience": "redirect_to_url",
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "bank_redirect",
            "payment_method_subtype": "ideal",
            "payment_experience": "redirect_to_url",
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "bank_redirect",
            "payment_method_subtype": "eps",
            "payment_experience": "redirect_to_url",
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "bank_redirect",
            "payment_method_subtype": "bancontact_card",
            "payment_experience": "redirect_to_url",
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "bank_redirect",
            "payment_method_subtype": "przelewy24",
            "payment_experience": "redirect_to_url",
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "bank_redirect",
            "payment_method_subtype": "sofort",
            "payment_experience": "redirect_to_url",
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "bank_redirect",
            "payment_method_subtype": "blik",
            "payment_experience": "redirect_to_url",
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "bank_redirect",
            "payment_method_subtype": "trustly",
            "payment_experience": "redirect_to_url",
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "bank_redirect",
            "payment_method_subtype": "online_banking_finland",
            "payment_experience": "redirect_to_url",
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "bank_redirect",
            "payment_method_subtype": "online_banking_poland",
            "payment_experience": "redirect_to_url",
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "bank_transfer",
            "payment_method_subtype": "ach",
            "payment_experience": "redirect_to_url",
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "bank_transfer",
            "payment_method_subtype": "sepa",
            "payment_experience": "redirect_to_url",
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "bank_transfer",
            "payment_method_subtype": "bacs",
            "payment_experience": "redirect_to_url",
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "bank_debit",
            "payment_method_subtype": "ach",
            "payment_experience": null,
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "bank_debit",
            "payment_method_subtype": "sepa",
            "payment_experience": null,
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "bank_debit",
            "payment_method_subtype": "bacs",
            "payment_experience": null,
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "bank_debit",
            "payment_method_subtype": "becs",
            "payment_experience": null,
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "pay_later",
            "payment_method_subtype": "klarna",
            "payment_experience": "invoke_sdk_client",
            "required_fields": null,
            "surcharge_details": null
        },
        {
            "payment_method_type": "pay_later",
            "payment_method_subtype": "klarna",
            "payment_experience": "redirect_to_url",
            "required_fields": null,
            "surcharge_details": null
        }
    ],
    "customer_payment_methods": null
}
```

Patch:
diff --git a/api-reference-v2/openapi_spec.json b/api-reference-v2/openapi_spec.json
index e3b41ce3899..6e1c321d250 100644
--- a/api-reference-v2/openapi_spec.json
+++ b/api-reference-v2/openapi_spec.json
@@ -21692,6 +21692,14 @@
               "payment_method_subtype": {
                 "$ref": "#/components/schemas/PaymentMethodType"
               },
+              "payment_experience": {
+                "allOf": [
+                  {
+                    "$ref": "#/components/schemas/PaymentExperience"
+                  }
+                ],
+                "nullable": true
+              },
               "required_fields": {
                 "allOf": [
                   {
diff --git a/crates/api_models/src/payments.rs b/crates/api_models/src/payments.rs
index 7ab8bc19361..adbfb56c0fa 100644
--- a/crates/api_models/src/payments.rs
+++ b/crates/api_models/src/payments.rs
@@ -7605,6 +7605,10 @@ pub struct ResponsePaymentMethodTypesForPayments {
     #[schema(example = "klarna", value_type = PaymentMethodType)]
     pub payment_method_subtype: common_enums::PaymentMethodType,
 
+    /// The payment experience for the payment method
+    #[schema(value_type = Option<PaymentExperience>)]
+    pub payment_experience: Option<common_enums::PaymentExperience>,
+
     /// payment method subtype specific information
     #[serde(flatten)]
     #[schema(value_type = Option<PaymentMethodSubtypeSpecificData>)]
diff --git a/crates/router/src/core/payments/payment_methods.rs b/crates/router/src/core/payments/payment_methods.rs
index 887bd078914..208333ba0b2 100644
--- a/crates/router/src/core/payments/payment_methods.rs
+++ b/crates/router/src/core/payments/payment_methods.rs
@@ -87,6 +87,9 @@ impl FilteredPaymentMethodsEnabled {
                     payment_method_subtype: payment_methods_enabled
                         .payment_methods_enabled
                         .payment_method_subtype,
+                    payment_experience: payment_methods_enabled
+                        .payment_methods_enabled
+                        .payment_experience,
                 },
             )
             .collect();
@@ -100,6 +103,7 @@ struct RequiredFieldsForEnabledPaymentMethod {
     required_field: Option<Vec<api_models::payment_methods::RequiredFieldInfo>>,
     payment_method_subtype: common_enums::PaymentMethodType,
     payment_method_type: common_enums::PaymentMethod,
+    payment_experience: Option<common_enums::PaymentExperience>,
 }
 
 /// Container to hold the filtered payment methods enabled with required fields
@@ -110,6 +114,7 @@ struct RequiredFieldsAndSurchargeForEnabledPaymentMethodType {
     required_field: Option<Vec<api_models::payment_methods::RequiredFieldInfo>>,
     payment_method_subtype: common_enums::PaymentMethodType,
     payment_method_type: common_enums::PaymentMethod,
+    payment_experience: Option<common_enums::PaymentExperience>,
     surcharge: Option<api_models::payment_methods::SurchargeDetailsResponse>,
 }
 
@@ -127,6 +132,7 @@ impl RequiredFieldsAndSurchargeForEnabledPaymentMethodTypes {
                 api_models::payments::ResponsePaymentMethodTypesForPayments {
                     payment_method_type: payment_methods_enabled.payment_method_type,
                     payment_method_subtype: payment_methods_enabled.payment_method_subtype,
+                    payment_experience: payment_methods_enabled.payment_experience,
                     required_fields: payment_methods_enabled.required_field,
                     surcharge_details: payment_methods_enabled.surcharge,
                     extra_information: None,
@@ -153,6 +159,7 @@ impl RequiredFieldsForEnabledPaymentMethodTypes {
                     payment_method_type: payment_methods_enabled.payment_method_type,
                     required_field: payment_methods_enabled.required_field,
                     payment_method_subtype: payment_methods_enabled.payment_method_subtype,
+                    payment_experience: payment_methods_enabled.payment_experience,
                     surcharge: None,
                 },
             )