Issue:
Bug: [BUG] CPF info not getting populated for Facilitapay required fields



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<img width="1158" alt="Image" src="https://github.com/user-attachments/assets/5ceb4cd2-db27-4ff2-8252-2719c7a755e5" />

<img width="1057" alt="Image" src="https://github.com/user-attachments/assets/54a1299b-727f-4441-b072-0b93d2a0468d" />

Pull request description:
## Type of Change
<!-- Put an `x` in the boxes that apply -->

- [x] Bugfix
- [ ] New feature
- [ ] Enhancement
- [ ] Refactoring
- [ ] Dependency updates
- [ ] Documentation
- [ ] CI/CD

## Description
<!-- Describe your changes in detail -->

This PR fixes the required fields error in SDK.

### 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).
-->

SDK throws `Missing Required Param: cpf`.

Closes https://github.com/juspay/hyperswitch/issues/8275

## 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)?
-->

CPF now gets populated:

```curl
curl --location 'http://localhost:8080/account/payment_methods?client_secret=pay_1iYxKKzKMLFXthlD6iAO_secret_i2gpOEtZadPHnlUpKR1Z' \
--header 'Accept: application/json' \
--header 'api-key: pk_dev_9caa65826ff740e78fcf292b7d96f31f'
```
```json
{
    "redirect_url": "https://duck.com/",
    "currency": "BRL",
    "payment_methods": [
        {
            "payment_method": "card",
            "payment_method_types": [
                {
                    "payment_method_type": "credit",
                    "payment_experience": null,
                    "card_networks": [
                        {
                            "card_network": "Interac",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "facilitapay"
                            ]
                        },
                        {
                            "card_network": "Discover",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "facilitapay"
                            ]
                        },
                        {
                            "card_network": "AmericanExpress",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "facilitapay"
                            ]
                        },
                        {
                            "card_network": "JCB",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "facilitapay"
                            ]
                        },
                        {
                            "card_network": "Visa",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "facilitapay"
                            ]
                        },
                        {
                            "card_network": "DinersClub",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "facilitapay"
                            ]
                        },
                        {
                            "card_network": "Mastercard",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "facilitapay"
                            ]
                        },
                        {
                            "card_network": "UnionPay",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "facilitapay"
                            ]
                        },
                        {
                            "card_network": "RuPay",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "facilitapay"
                            ]
                        }
                    ],
                    "bank_names": null,
                    "bank_debits": null,
                    "bank_transfers": null,
                    "required_fields": null,
                    "surcharge_details": null,
                    "pm_auth_connector": null
                },
                {
                    "payment_method_type": "debit",
                    "payment_experience": null,
                    "card_networks": [
                        {
                            "card_network": "AmericanExpress",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "facilitapay"
                            ]
                        },
                        {
                            "card_network": "Interac",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "facilitapay"
                            ]
                        },
                        {
                            "card_network": "JCB",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "facilitapay"
                            ]
                        },
                        {
                            "card_network": "Visa",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "facilitapay"
                            ]
                        },
                        {
                            "card_network": "Discover",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "facilitapay"
                            ]
                        },
                        {
                            "card_network": "Mastercard",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "facilitapay"
                            ]
                        },
                        {
                            "card_network": "UnionPay",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "facilitapay"
                            ]
                        },
                        {
                            "card_network": "DinersClub",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "facilitapay"
                            ]
                        },
                        {
                            "card_network": "RuPay",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "facilitapay"
                            ]
                        }
                    ],
                    "bank_names": null,
                    "bank_debits": null,
                    "bank_transfers": null,
                    "required_fields": null,
                    "surcharge_details": null,
                    "pm_auth_connector": null
                }
            ]
        },
        {
            "payment_method": "bank_transfer",
            "payment_method_types": [
                {
                    "payment_method_type": "pix",
                    "payment_experience": null,
                    "card_networks": null,
                    "bank_names": null,
                    "bank_debits": null,
                    "bank_transfers": {
                        "eligible_connectors": [
                            "facilitapay"
                        ]
                    },
                    "required_fields": {
                        "billing.address.country": {
                            "required_field": "payment_method_data.billing.address.country",
                            "display_name": "country",
                            "field_type": {
                                "user_address_country": {
                                    "options": [
                                        "BR"
                                    ]
                                }
                            },
                            "value": "BR"
                        },
                        "payment_method_data.bank_transfer.pix.source_bank_account_id": {
                            "required_field": "payment_method_data.bank_transfer.pix.source_bank_account_id",
                            "display_name": "source_bank_account_id",
                            "field_type": "user_source_bank_account_id",
                            "value": null
                        },
                        "payment_method_data.bank_transfer.pix.destination_bank_account_id": {
                            "required_field": "payment_method_data.bank_transfer.pix.destination_bank_account_id",
                            "display_name": "destination_bank_account_id",
                            "field_type": "user_destination_bank_account_id",
                            "value": null
                        },
                        "payment_method_data.bank_transfer.pix.cpf": {
                            "required_field": "payment_method_data.bank_transfer.pix.cpf",
                            "display_name": "cpf",
                            "field_type": "user_cpf",
                            "value": null
                        },
                        "billing.address.last_name": {
                            "required_field": "payment_method_data.billing.address.last_name",
                            "display_name": "card_holder_name",
                            "field_type": "user_full_name",
                            "value": "THE"
                        },
                        "billing.address.first_name": {
                            "required_field": "payment_method_data.billing.address.first_name",
                            "display_name": "card_holder_name",
                            "field_type": "user_full_name",
                            "value": "PiX"
                        }
                    },
                    "surcharge_details": null,
                    "pm_auth_connector": null
                }
            ]
        }
    ],
    "mandate_payment": null,
    "merchant_name": "NewAge Retailer",
    "show_surcharge_breakup_screen": false,
    "payment_type": "normal",
    "request_external_three_ds_authentication": false,
    "collect_shipping_details_from_wallets": false,
    "collect_billing_details_from_wallets": false,
    "is_tax_calculation_enabled": false
}
```

## Checklist
<!-- Put an `x` in the boxes that apply -->

- [x] I formatted the code `cargo +nightly fmt --all`
- [x] I addressed lints thrown by `just clippy && just clippy_v2`
- [x] I reviewed the submitted code
- [ ] I added unit tests for my changes where possible


Testing:


CPF now gets populated:

```curl
curl --location 'http://localhost:8080/account/payment_methods?client_secret=pay_1iYxKKzKMLFXthlD6iAO_secret_i2gpOEtZadPHnlUpKR1Z' \
--header 'Accept: application/json' \
--header 'api-key: pk_dev_9caa65826ff740e78fcf292b7d96f31f'
```
```json
{
    "redirect_url": "https://duck.com/",
    "currency": "BRL",
    "payment_methods": [
        {
            "payment_method": "card",
            "payment_method_types": [
                {
                    "payment_method_type": "credit",
                    "payment_experience": null,
                    "card_networks": [
                        {
                            "card_network": "Interac",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "facilitapay"
                            ]
                        },
                        {
                            "card_network": "Discover",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "facilitapay"
                            ]
                        },
                        {
                            "card_network": "AmericanExpress",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "facilitapay"
                            ]
                        },
                        {
                            "card_network": "JCB",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "facilitapay"
                            ]
                        },
                        {
                            "card_network": "Visa",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "facilitapay"
                            ]
                        },
                        {
                            "card_network": "DinersClub",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "facilitapay"
                            ]
                        },
                        {
                            "card_network": "Mastercard",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "facilitapay"
                            ]
                        },
                        {
                            "card_network": "UnionPay",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "facilitapay"
                            ]
                        },
                        {
                            "card_network": "RuPay",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "facilitapay"
                            ]
                        }
                    ],
                    "bank_names": null,
                    "bank_debits": null,
                    "bank_transfers": null,
                    "required_fields": null,
                    "surcharge_details": null,
                    "pm_auth_connector": null
                },
                {
                    "payment_method_type": "debit",
                    "payment_experience": null,
                    "card_networks": [
                        {
                            "card_network": "AmericanExpress",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "facilitapay"
                            ]
                        },
                        {
                            "card_network": "Interac",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "facilitapay"
                            ]
                        },
                        {
                            "card_network": "JCB",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "facilitapay"
                            ]
                        },
                        {
                            "card_network": "Visa",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "facilitapay"
                            ]
                        },
                        {
                            "card_network": "Discover",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "facilitapay"
                            ]
                        },
                        {
                            "card_network": "Mastercard",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "facilitapay"
                            ]
                        },
                        {
                            "card_network": "UnionPay",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "facilitapay"
                            ]
                        },
                        {
                            "card_network": "DinersClub",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "facilitapay"
                            ]
                        },
                        {
                            "card_network": "RuPay",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "facilitapay"
                            ]
                        }
                    ],
                    "bank_names": null,
                    "bank_debits": null,
                    "bank_transfers": null,
                    "required_fields": null,
                    "surcharge_details": null,
                    "pm_auth_connector": null
                }
            ]
        },
        {
            "payment_method": "bank_transfer",
            "payment_method_types": [
                {
                    "payment_method_type": "pix",
                    "payment_experience": null,
                    "card_networks": null,
                    "bank_names": null,
                    "bank_debits": null,
                    "bank_transfers": {
                        "eligible_connectors": [
                            "facilitapay"
                        ]
                    },
                    "required_fields": {
                        "billing.address.country": {
                            "required_field": "payment_method_data.billing.address.country",
                            "display_name": "country",
                            "field_type": {
                                "user_address_country": {
                                    "options": [
                                        "BR"
                                    ]
                                }
                            },
                            "value": "BR"
                        },
                        "payment_method_data.bank_transfer.pix.source_bank_account_id": {
                            "required_field": "payment_method_data.bank_transfer.pix.source_bank_account_id",
                            "display_name": "source_bank_account_id",
                            "field_type": "user_source_bank_account_id",
                            "value": null
                        },
                        "payment_method_data.bank_transfer.pix.destination_bank_account_id": {
                            "required_field": "payment_method_data.bank_transfer.pix.destination_bank_account_id",
                            "display_name": "destination_bank_account_id",
                            "field_type": "user_destination_bank_account_id",
                            "value": null
                        },
                        "payment_method_data.bank_transfer.pix.cpf": {
                            "required_field": "payment_method_data.bank_transfer.pix.cpf",
                            "display_name": "cpf",
                            "field_type": "user_cpf",
                            "value": null
                        },
                        "billing.address.last_name": {
                            "required_field": "payment_method_data.billing.address.last_name",
                            "display_name": "card_holder_name",
                            "field_type": "user_full_name",
                            "value": "THE"
                        },
                        "billing.address.first_name": {
                            "required_field": "payment_method_data.billing.address.first_name",
                            "display_name": "card_holder_name",
                            "field_type": "user_full_name",
                            "value": "PiX"
                        }
                    },
                    "surcharge_details": null,
                    "pm_auth_connector": null
                }
            ]
        }
    ],
    "mandate_payment": null,
    "merchant_name": "NewAge Retailer",
    "show_surcharge_breakup_screen": false,
    "payment_type": "normal",
    "request_external_three_ds_authentication": false,
    "collect_shipping_details_from_wallets": false,
    "collect_billing_details_from_wallets": false,
    "is_tax_calculation_enabled": false
}
```

Patch:
diff --git a/crates/payment_methods/src/configs/payment_connector_required_fields.rs b/crates/payment_methods/src/configs/payment_connector_required_fields.rs
index 0a5dca9c0e2..478c2ea2448 100644
--- a/crates/payment_methods/src/configs/payment_connector_required_fields.rs
+++ b/crates/payment_methods/src/configs/payment_connector_required_fields.rs
@@ -3107,6 +3107,7 @@ fn get_bank_transfer_required_fields() -> HashMap<enums::PaymentMethodType, Conn
                             RequiredField::BillingAddressCountries(vec!["BR"]).to_tuple(),
                             RequiredField::BillingUserFirstName.to_tuple(),
                             RequiredField::BillingUserLastName.to_tuple(),
+                            RequiredField::PixCpf.to_tuple(),
                         ]),
                     },
                 ),