Census change history: Some syncs failing with "Missing corresponding dataset file for prefix: record_deletes.0"

Census reported a major Sync Engine incident starting 2025-02-05 22:38 UTC: some syncs failed with "Missing corresponding dataset file for prefix: record_deletes.0" after a code change introduced a bug. A revert deployed at 22:56 UTC; the incident was resolved at 2025-02-05 23:30 UTC after over 30 minutes without errors, with a computed duration of 51 min.