fix: align all 212 tests with current API and add CI workflows

Update integration tests to match actual endpoint responses: remove
data wrappers, use snake_case fields, correct HTTP methods (PUT→POST
for directory create), status codes (200→204 for mutations), and
request formats (params→json for 2FA). Fix root-level and unit tests
for DatabaseManager migration, model CRUD patterns, and JWT setup.
Add GitHub Actions and Gitea CI configs with ubuntu-latest + Python 3.13.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tests/example_test.py

@@ -32,7 +32,8 @@ async def test_user_factory(db_session: AsyncSession):
     assert user.id is not None
     assert user.email == "testuser@test.local"
     assert user.group_id == group.id
-    assert user.status is True
+    from sqlmodels.user import UserStatus
+    assert user.status == UserStatus.ACTIVE
 
 
 @pytest.mark.unit