feat(router): add refunds manual-update api

[sai-harsha-vardhan]

Type of Change

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

Description

add refunds manual-update api

refunds manual-update api allows to update the refund details like status, error code and error message

Additional Changes

• [x] This PR modifies the API contract
• [ ] This PR modifies the database schema
• [ ] This PR modifies application configuration/environment variables

Motivation and Context

How did you test it?

Tested Manually

1. Create a refund

2. Check the status, error code and message in DB

3. Call Manual Update API for refund CURL

   curl --location --request PUT '{{API_BASE_URL}}/refunds/{{refund_id}}/manual-update' \
   --header 'Content-Type: application/json' \
   --header 'Accept: application/json' \
   --header 'api-key: {{ADMIN_API_KEY}}' \
   --data-raw '{
   "merchant_id": "{{MERCHANT_ID}}",
   "status": "failed",
   "error_code": "code",
   "error_message": "message"
   }'

   

4. Observe the changes in DB

Checklist

• [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