{
  "router": "R1",
  "ip": "101.101.101.101",
  "duration_seconds": 120,
  "samples_total": 14,
  "samples_valid": 13,
  "avg_cpu": 6.92,
  "max_cpu": 10,
  "timestamps": [
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  ],
  "plot_file": "r1_cpu_monitor_20260222_030321.jpg"
}