fix(router): hotfixes for stripe webhook event mapping and reference id retrieval

[vspecky]

Type of Change

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

Description

This PR makes the following fixes to the Stripe incoming webhooks implementation

• An Unknown variant was added to the WebhookEventStatus enum to handle unsupported dispute events
• A bug was fixed in the retrieval of the object reference ID for Payment Intent objects vs Charge and Dispute objects (different fields)
• Special handling for ACH Credit Transfers was added to processing of the charge.succeeded event
• Minor robustness and quality of life changes.

Additional Changes

None

• 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?

Local testing of Stripe webhooks

Checklist

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