Which dashboards, which dates, ETA

“A third-party source silently changed a field's type and our bronze load coerced it to null. The first I knew was a finance lead asking why revenue dropped 8% overnight - which told me the real failure was that we had no distribution check and no schema gate. I quarantined the bad partitions, rolled the gold revenue table back to the prior day's snapshot and posted a plain-English impact note: which dashboards, which dates, ETA. The lasting fix wasn't the backfill - it was a schema-registry gate on ingestion plus null-rate checks that now fail the asset closed before it can poison gold. We haven't had a silent type-change leak since.”