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- apps/scheduler/src/queue.ts: PUBLISH_QUEUE, BullMQ-compatible Redis connection factory, queue factory, default retry/backoff job opts. - apps/scheduler/src/worker.ts: makePublishWorker factory drives the publish-loop state machine (queued -> dispatching -> published | failed/dlq) and persists each transition to publications. Dispatcher is injected (fake in tests; the LinkedIn client swaps in once Gate 0.9 / CMA lands). - apps/scheduler/src/main.ts: runnable entry; boots the worker; LinkedIn dispatch is fail-closed until CMA is approved. - apps/scheduler/src/worker.integration.test.ts: gated behind INTEGRATION=1; verifies enqueue -> consume -> row published within 5s, and failure -> dlq with error recorded. Run against real Redis + Postgres. Closes the Stage 4.1 DoD (enqueue -> worker-consume -> DB row updated within 5s). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>