{
  "demo_id": "demo_20260316_152851",
  "scenario_id": "glucose",
  "dataset_id": "glu-sec01-core",
  "dataset_title": "Patient Cohort 01 / Stable CGM",
  "rows": [],
  "feature_keys": [
    "G",
    "I",
    "M"
  ],
  "target_key": "T",
  "summary": {
    "row_count": 0,
    "source": "none"
  }
}