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{"scenario": "equipment_activity_monitor", "summary_index": 0, "summary_kind": "cumulative_monitoring_seconds", "contract_mode": "periodic_and_finalize_summary", "generated_at": "2026-05-13T11:17:22.765874+09:00", "emitted_by": "periodic", "payload": {"category": "굴착기", "total_tracks": 28, "total_work_frames": 513, "total_work_seconds": 51.3, "final_frame": 500}, "frame_idx": 499, "frame_at": "2026-05-13T11:14:08.644977+09:00", "summary_interval_sec": 10}
{"scenario": "equipment_activity_monitor", "summary_index": 0, "summary_kind": "cumulative_monitoring_seconds", "contract_mode": "periodic_and_finalize_summary", "generated_at": "2026-05-13T11:18:10.637392+09:00", "emitted_by": "periodic", "payload": {"category": "굴착기", "total_tracks": 40, "total_work_frames": 637, "total_work_seconds": 63.7, "final_frame": 600}, "frame_idx": 599, "frame_at": "2026-05-13T11:14:18.644977+09:00", "summary_interval_sec": 10}
{"scenario": "equipment_activity_monitor", "summary_index": 0, "summary_kind": "cumulative_monitoring_seconds", "contract_mode": "periodic_and_finalize_summary", "generated_at": "2026-05-13T11:19:01.024974+09:00", "emitted_by": "periodic", "payload": {"category": "굴착기", "total_tracks": 42, "total_work_frames": 727, "total_work_seconds": 72.7, "final_frame": 700}, "frame_idx": 699, "frame_at": "2026-05-13T11:14:28.644977+09:00", "summary_interval_sec": 10}
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