Phase 3 of worker lifecycle fix plan:
- Add spawn import from child_process for detached process creation
- Add PID file management (writePidFile, readPidFile, removePidFile)
- Add health check utilities (isPortInUse, waitForHealth, httpShutdown, waitForPortFree)
- Replace entry point with CLI handling (start/stop/restart/status/--daemon)
The worker now spawns itself with --daemon flag for background execution,
returning immediately with hook response while the daemon runs in background.
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Alex Newman
b7c6649d9e