feat(core): enable payment refund when payment is partially captured

[hrithikesh026]

Type of Change

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

Description

Currently, payment refund would only happen when intent status is succeeded(full capture).
With this change, it would be possible to refund the payment even when if is partially captured

Additional Changes

• 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?

Manual

1. Create merchant with stripe connector.
2. Create a payment with confirm = true, capture = manual
3. Later, partially capture the payment ("amount_to_capture < amount"). (status changes to partially_captured)
4. Then do a refund on the above payment for the captured amount.

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
• I added a CHANGELOG entry if applicable

[Narayanbhat166]

you can refactor the existing method to accept a vector of payment statuses, you can create an issue for this and take up in a separate PR