Migrated ThinkAuth (Authentik)'s database to a high-availability cluster with automatic failover, closing a single point of failure that could have taken down sign-in for every \_Think\_ ser

Migrated ThinkAuth (Authentik)'s database to a high-availability cluster with automatic failover, closing a single point of failure that could have taken down sign-in for every Think service.

Imported from the 2026/07/01-2026/07/31 release.