The sync succeeded, but it wrote zero rows

What it looks like

The sync reports success while records_written is 0 for a run that should copy new data.

Why a heartbeat is green

Connecting, querying, and exiting cleanly can all succeed even when the result set is empty.

Expectation that catches it

Add an output expectation that warns when records_written is less than 1.

Report it to Glnc

Count committed destination records, not rows merely read, and include that count in the completion receipt.

POST /api/v1/monitoring/checks/warehouse-sync/runs

{
  "result": "succeeded",
  "report_id": "warehouse-sync-20260830T031500Z",
  "evidence": {
    "records_written": 0
  }
}