test(P14.1): add comprehensive backend API test suite
Add 134 tests as independent test project:
- test_auth.py (5): Login, JWT, protected endpoints
- test_users.py (8): User CRUD, permissions
- test_projects.py (8): Project CRUD, ownership
- test_milestones.py (7): Milestone CRUD, filtering
- test_tasks.py (8): Task CRUD, filtering
- test_comments.py (5): Comment CRUD, permissions
- test_roles.py (9): Role/permission management
- test_milestone_actions.py (17): Milestone state machine
- test_task_transitions.py (34): Task state machine
- test_propose.py (19): Propose CRUD, lifecycle
- test_misc.py (14): Notifications, activity, API keys, dashboard
Setup:
- conftest.py: SQLite in-memory DB, fixtures
- requirements.txt: Dependencies
- pyproject.toml: Pytest config
- README.md: Documentation
zhi
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