feat(router): make core changes in payments flow to support incremental authorization

[sai-harsha-vardhan]

Type of Change

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

Description

Incremental authorizations allows you to increase authorized amount for a payment before capturing it

• This is possible only for card payments and specific networks, with some criteria specific to connector
• Incremental Authorizations can be done multiple times and maximum attempts is again based on connector
• Total amount capturable would be sum of initial authorized amount and all the incremented additional amounts

1. accept request_incremental_authorization flag in payments request
2. send the corresponding value in payments_authorize_data to connecor flows
3. receive incremental_authorization_allowed from connector flows
4. store them in payment_intent and send incremental_authorization_allowed back in payments response

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?

Tested Manually

1. send request_incremental_authorization as true in request, with capture_method automatic. should fail with an error

2. send request_incremental_authorization as false in request, see incremental_authorization_allowed being false in response for successful payment in Cybersouce

3. send request_incremental_authorization as true in request, see incremental_authorization_allowed being true in response for successful payment in Cybersouce

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

[sahkal]

@sai-harsha-vardhan Please resolve conflicts.

[sahkal]

@sai-harsha-vardhan CI checks are failing along with OPENAPI specs can you please fix these.

[prasunna09]

Have reviewed only connector changes!