# Queue Operations

| Queue | Producer | Consumer | Idempotency/failure |
|---|---|---|---|
| activity | audit service | activity worker | event-based job ID; database activity record |
| email | email service | email worker | event job ID; retry/backoff; delivery status |
| document | document service | document worker | persisted document state; bounded concurrency |
| log | structured log utility | log worker | redacted payload; retained operationally |

Workers run independently with `node app/workers/index.js`; the API does not consume jobs. Validate Redis authentication, queue prefixes, retries, retention, dead/final failures, and Bull Board access in staging. Alert on failed jobs and sustained backlog. Redis/BullMQ were **IMPLEMENTED_UNVERIFIED** in this environment.