Advanced AI Prompt for Webhook and Event-Driven Architecture Documentation

Act as an API Architect and Integration Specialist. Write an exhaustive, developer-facing documentation manual detailing a high-throughput Webhook integration system. Clearly define and list the specific [EVENT_TYPES] emitted by the system (e.g., `payment.succeeded`, `user.deleted`). For every event, provide a flawless JSON example of the expected [PAYLOAD_SCHEMA]. The documentation must include a highly technical security section detailing the exact HMAC SHA-256 [SECRET_VALIDATION] mathematical process third-party developers must implement to verify the cryptographic authenticity of incoming requests. Explain the server's strict [RETRY_POLICY] (e.g., exponential backoff over 72 hours) and mandate architectural best practices for downstream consumers to handle duplicate, idempotent requests without corrupting their local databases.