Introduced logic to check the existence of `pg_stat_checkpointer` and fetch corresponding statistics when available. This ensures compatibility with newer PostgreSQL versions while maintaining backward support using `pg_stat_bgwriter`.
This commit introduces a detailed database overview endpoint and service, providing key metrics such as replication status, database sizes, and performance indicators. On the frontend, a new UI section displays these metrics along with improved forms and troubleshooting tips. Enhancements improve user experience by adding informative tooltips and formatting for byte and time values.
