Census change history: Sync Outage in azure-eastus region

Census reported a major Sync Engine outage in azure-eastus starting 2026-10-01 14:20 UTC, with syncs failing amid spotty Azure Redis connectivity. Redis connectivity was restored and syncs were completing successfully by 2026-10-01 15:14 UTC; the incident was resolved at 2026-10-01 17:36 UTC, lasting 3 h 16 min.