- Add 35 ForeignKey constraints across 15 tables (was zero)
- ON DELETE CASCADE for parent-child relationships (project → children)
- ON DELETE SET NULL for optional user references (created_by, assignee, etc.)
- Add relationship() with back_populates and cascade on all models
- Alter 11 columns from nullable=False to nullable=True for SET NULL
- Add 2 missing indexes on FK columns (assets.uploaded_by_user_id,
project_titles.created_by_user_id)
- Update Pydantic response models to accept str | None for nullable fields
- Add Alembic migration 010 with complete upgrade/downgrade
Closes#17
API文档维护Agent
01f5541e14