fix: use correct interpolation in alembic url#390
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📝 Pull Request Summary
This change fixes a DSN escaping bug in MemU for passwords with special characters.
✅ What does this PR do?
Use the DSN in two contexts correctly:
Raw URL-encoded DSN for SQLAlchemy/psycopg connections (so DB auth works).
%-escaped DSN only when setting Alembic config (sqlalchemy.url) to satisfy ConfigParser interpolation rules.
🤔 Why is this change needed?
alembic.ini requires a double escaped of '%' in postgres dsn.
🔍 Type of Change
Please check what applies:
✅ PR Quality Checklist
📌 Optional