June 2026 monthly summary: Delivered a feature in debezium/debezium for MariaDB Connector: GTID-based replication domain tracking and failover recovery. This feature adjusts GTID containment to ignore server IDs, enabling per-domain GTID progress tracking and reliable recovery of schema history across server failovers. Implemented new methods and tests to support the domain-based approach. Result: reduced post-failover capture failures, improved startup resilience, and more robust CDC in failover scenarios. Technologies demonstrated include GTID semantics, domain-based containment, test-driven development, and code reviews. Business value: higher data reliability, lower downtime during failover, and improved maintainability of schema history.