Implement comprehensive webhook system supporting 40+ event types with automatic retries, HMAC signatures, delivery tracking, REST API, and admin UI. Integrates with Activity logging for automatic event triggering.
- Database: Add webhooks and webhook_deliveries tables (migration 046)
- API: Full CRUD endpoints with read:webhooks/write:webhooks scopes
- UI: Admin interface for webhook management and testing
- Service: Automatic retry with exponential backoff every 5 minutes
- Security: HMAC-SHA256 signature verification
- Tests: Model and service tests included
- Docs: Complete integration guide with examples
