#3340 fix(targets): Track table preparation to prevent data loss on schema changes Pull request opened by edgarrmondragon ## Summary by Sourcery Prevent data loss when target schemas change mid-stream by tracking table preparation state and only dropping tables on the first overwrite, then incrementally adding new columns thereafter. Bug Fixes: • Fix unexpected table drops and data loss on schema changes in OVERWRITE mode Enhancements: • Introduce a preparation cache to ensure tables are only dropped once per run and subsequent schema updates add columns incrementally Tests: • Add unit tests to verify tables aren’t dropped and data is preserved during schema evolution • Add an end-to-end SQLite integration test for successive schema changes meltano/sdk