alembic-ini-db-url-triggers-secret-scanner-on-commit

Placing a database URL directly in alembic.ini causes the pre-commit secret scanner to block the commit. The fix is to leave the URL field empty in alembic.ini and rely entirely on the RSAME_DATABASE_URL (or equivalent) environment variable, which alembic env.py already reads. This pattern should be applied to all new projects using Alembic from the start.