Application status change notification

Webhook endpoint for receiving application status change notifications. This is triggered when an application transitions between states during its lifecycle. Use this to track application progress asynchronously, especially useful when a create or charge request times out.

Common status transitions:

• APPLICATION_CREATED -> APPLICATION_APPROVED: Credit policy approved
• APPLICATION_CREATED -> APPLICATION_DECLINED: Credit policy declined
• CONTRACT_SIGNED -> APPROVED: Anti-fraud approved
• CONTRACT_SIGNED -> DECLINED: Anti-fraud declined
• SUBMITTED_TO_FI -> FUNDED: Disbursement completed
• SUBMITTED_TO_FI -> FUNDING_FAILED: Disbursement failed