#10443 docs: document SQLite to Postgres system DB migration Pull request opened by lavkushry Summary • Document that there is no automatic SQLite→Postgres migration. • Outline a safe cutover (new DB, schema create, recreate/backup). Fixes #6774 Test plan • Review the caution under System database Summary by Sourcery Documentation: • Document the lack of automatic SQLite-to-Postgres or other backend migration and provide a safe cutover procedure for existing Meltano projects. meltano/meltano