v0.9.0

Features

• Enhanced publish endpoint response with duplicate field indicating whether an event was already processed via idempotency, allowing clients to distinguish between new and deduplicated events by @alexluong in #563
• Configurable retry monitor polling via RETRY_POLL_BACKOFF_MS environment variable, allowing operators to tune the retry queue polling interval by @alexluong in #562
• Self-managed message queue infrastructure via MQS_AUTO_PROVISION environment variable, allowing operators to manage their own message queue infrastructure instead of automatic provisioning by @alexluong in #560
• Comprehensive health check endpoint refactor returning structured JSON with individual worker status reporting (HTTP 200 for healthy, 503 for failed), enabling better integration with container orchestration health probes by @alexluong in #558

Full Changelog: v0.8.0...v0.9.0