{
  "elapsed_seconds": 16,
  "total": 1,
  "done": 0,
  "failed": 1,
  "in_progress": 0,
  "songs": {
    "01_溯 (Reverse)_20260328": {
      "step": "step05",
      "status": "failed",
      "time": "17:54:24"
    }
  }
}