shigoto_heartbeat (shigoto v1.9.10)

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Heartbeat system for executing jobs. Periodically updates heartbeat_at for all in-flight jobs on this node, enabling faster stale job detection.

Without heartbeat, stale jobs are detected after 5 minutes. With heartbeat, a job is considered stale if its heartbeat is older than 2x the heartbeat interval (default: 60 seconds).