Release Checklist

This checklist captures the work required before cutting a release that includes the graceful worker shutdown feature.

1. Code Hygiene / Compilation

1. Merge the graceful-shutdown helpers into the canonical worker type to avoid Worker redeclared errors (see cmd/worker/worker_graceful_shutdown.go and cmd/worker/worker_server.go).
2. Ensure the worker struct exposes the fields referenced by the new helpers (logger, queue, cfg, metrics).
3. go build ./cmd/worker succeeds without undefined-field errors.

2. Graceful Shutdown Logic

1. Initialize shutdownCh, activeTasks, and gracefulWait during worker start-up.
2. Confirm the heartbeat/lease helpers compile and handle queue errors gracefully (heartbeatLoop, releaseAllLeases).
3. Add tests (unit or integration) that simulate SIGINT/SIGTERM and verify leases are released or tasks complete.

3. Task Execution Flow

1. Align executeTaskWithLease with the real executeTask signature so the "no value used as value" compile error disappears.
2. Double-check retry/metrics paths still match existing worker behavior after the new wrapper is added.

4. Server Wiring

1. Ensure worker construction in cmd/worker/worker_server.go wires up config, queue, metrics, and logger instances used by the shutdown logic.
2. Re-run worker unit tests plus any queue/lease e2e tests.

5. Validation Before Tagging

1. go test ./cmd/worker/... and make test (or equivalent) pass locally.
2. Manual smoke test: start worker, queue jobs, send SIGTERM, confirm tasks finish or leases are released and the process exits cleanly.
3. Update release notes describing the new shutdown capability and any config changes required (e.g., graceful timeout settings).