- Remove PostgreSQL-specific server_default from User.email_inbound_token.
The column has a Python-side default (secrets.token_urlsafe) that works
for both SQLite and PostgreSQL. The gen_random_bytes() server_default
caused sqlite table creation to fail.
- Add missing back_populates relationships to stub models so SQLAlchemy
mapper configuration succeeds. Purchase.user and Store.user_accounts
were missing, causing "has no property" errors during Base.metadata.create_all.
- Auto-fix ruff import sorting (I001) across all source and test files.
- Manually fix line-too-long (E501) in config.py.
Co-Authored-By: Paperclip <noreply@paperclip.ing>