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Node.js Scheduled Job Alerts with Heartbeat Monitoring (for Safer Rollbacks)

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TL;DR: A scheduled Node.js job needs two signals. Emit a structured completion or error event so operators can search what happened, and send a heartbeat to an independent monitor so it can notice when nothing happened. Logs alone can explain a crash, but they cannot prove that a scheduler ever launched the job. For a nightly media pipeline, I would keep those signals behind a tiny application-owned interface and deploy the monitor change before the job change. That makes rollback boring: the old and new job versions can emit the same contract while the log or heartbeat vendor changes behind i

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