fix(process): add process tracker support for instant refunds

[AkshayaFoiger]

Type of Change

• Bugfix
• New feature
• Enhancement
• Refactoring
• Dependency updates
• Documentation
• CI/CD

Description

This PR
Earlier pending refunds was not added to the process tracker. With this PR, the task will be added in the process tracker and process tracker will update respective refund's status.

How did you test it?

1. Create an instant refund with any connector

curl --location 'http://localhost:8080/refunds' \
--header 'Content-Type: application/json' \
--header 'Accept: application/json' \
--header 'api-key: dev_TDO8FwbwbQCasgvL5qiuYqCFVhWyTBUdBFA8usraNSQekdO51E9BKsiikwfVDyAR' \
--data '{"payment_id":"pay_GQ2WnvGFRKq6pa9024Or","amount":600,"reason":"Customer returned product","refund_type":"instant","metadata":{"udf1":"value1","new_customer":"true","login_date":"2019-09-10T10:11:12Z"}}'

Response

{
    "refund_id": "ref_opOquELRfQVFvtWf2C72",
    "payment_id": "pay_GQ2WnvGFRKq6pa9024Or",
    "amount": 600,
    "currency": "USD",
    "status": "pending",
    "reason": "Customer returned product",
    "metadata": {
        "udf1": "value1",
        "new_customer": "true",
        "login_date": "2019-09-10T10:11:12Z"
    },
    "error_message": null,
    "error_code": null,
    "created_at": "2024-09-05T13:24:10.440Z",
    "updated_at": "2024-09-05T13:24:11.917Z",
    "connector": "braintree",
    "profile_id": "pro_HSgGgX0GeQYxpGzOewm6",
    "merchant_connector_id": "mca_E99QghpSKd5cBgMTHwR7",
    "charges": null
}

2. Wait for the process tracker to update the status
   Process_tracker
   
   Refunds table with updated status
   

Checklist

• I formatted the code cargo +nightly fmt --all
• I addressed lints thrown by cargo clippy
• I reviewed the submitted code
• I added unit tests for my changes where possible

[semanticdiff-com]

Review changes with SemanticDiff.

Analyzed 5 of 5 files.

Overall, the semantic diff is 6% smaller than the GitHub diff.

	Filename	Status
✔️	crates/router/src/workflows/outgoing_webhook_retry.rs	Analyzed
✔️	crates/router/src/routes/refunds.rs	Analyzed
✔️	crates/router/src/core/refunds.rs	10.5% smaller
✔️	crates/router/src/core/webhooks/incoming.rs	Analyzed
✔️	crates/router/src/compatibility/stripe/refunds.rs	Analyzed

[jarnura]

Use match and handle error case