Cron Automation

OpenClaw skill for scheduled job orchestration: cron expression design with timezone and daylight-saving handling, idempotency keys and run locks so an overlapping trigger cannot double-execute, bounded retry with exponential backoff and a dead-letter path, heartbeat reporting into a channel, and drift detection when a schedule silently stops firing. It does not run jobs the operator has not registered, extend a job past its declared timeout, or retry a non-idempotent action.