feat: refactor imports and clean up code formatting across multiple files

backend/app/models/__init__.py

@@ -5,8 +5,8 @@ from app.models.board_memory import BoardMemory
 from app.models.board_onboarding import BoardOnboardingSession
 from app.models.boards import Board
 from app.models.gateways import Gateway
-from app.models.tasks import Task
 from app.models.task_fingerprints import TaskFingerprint
+from app.models.tasks import Task
 from app.models.users import User
 
 __all__ = [