Add migration scripts and functionality for marking applied migrations

Commit notes

- Introduced `mark-migrations-applied.ts` to read migration entries from a journal and mark them as applied in the database. - Added baseline SQL schema in `0000_baseline.sql` to define essential types and tables for the application. - Updated `_journal.json` to reflect the new baseline migration. - Enhanced `0000_snapshot.json` to include the latest schema definitions and relationships. - Created backup migration scripts for previous changes, ensuring a comprehensive migration history.

These changes improve migration management and ensure the database schema is up-to-date with the latest application requirements.