{
  "experiment": "native-power-query-freshness-witness",
  "started_utc": "2026-11-15T06:33:32.9393137Z",
  "prepared_execution": true,
  "expected_rows": 481,
  "expected_october_total": 686501,
  "excel_version": "16.0",
  "excel_build": 20527,
  "before_rows": 480,
  "before_october_total": 686500,
  "refresh_return": true,
  "refresh_seconds": 1.7609838,
  "after_rows": 481,
  "after_october_total": 686501,
  "query_count": 1,
  "witness_count": 1,
  "result": "PASS",
  "native_seconds": 7.0976497,
  "api_ms": 7885,
  "controller_seconds": 7.960130898999978,
  "cost": {
    "per_task_usd": null,
    "reason": "Existing isolated research pilot; billing store has a zero acceptance rate, not an attributable operating-cost measurement. No new VM, license or paid tool purchased."
  }
}