Refactor(backend): improve formatting in services, repositories & tests

- Consistently format multi-line function headers, exception handling, and repository method calls for readability.
- Reorganize misplaced imports across modules (e.g., services & tests) into proper sorted order.
- Adjust indentation, line breaks, and spacing inconsistencies in tests and migration files.
- Cleanup unnecessary trailing newlines and reorganize `__all__` declarations for consistency.

backend/app/api/routes/admin.py

@@ -27,9 +27,6 @@ from app.core.exceptions import (
 from app.core.repository_exceptions import DuplicateEntryError
 from app.models.user import User
 from app.models.user_organization import OrganizationRole
-from app.services.organization_service import organization_service
-from app.services.session_service import session_service
-from app.services.user_service import user_service
 from app.schemas.common import (
     MessageResponse,
     PaginatedResponse,
@@ -45,6 +42,9 @@ from app.schemas.organizations import (
 )
 from app.schemas.sessions import AdminSessionResponse
 from app.schemas.users import UserCreate, UserResponse, UserUpdate
+from app.services.organization_service import organization_service
+from app.services.session_service import session_service
+from app.services.user_service import user_service
 
 logger = logging.getLogger(__name__)
 

backend/app/api/routes/auth.py

@@ -429,9 +429,7 @@ async def confirm_password_reset(
                 raise HTTPException(
                     status_code=status.HTTP_400_BAD_REQUEST, detail=err_msg
                 )
-            raise HTTPException(
-                status_code=status.HTTP_404_NOT_FOUND, detail=err_msg
-            )
+            raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail=err_msg)
 
         # SECURITY: Invalidate all existing sessions after password reset
         # This prevents stolen sessions from being used after password change

backend/app/api/routes/oauth.py

@@ -25,7 +25,6 @@ from app.core.auth import decode_token
 from app.core.config import settings
 from app.core.database import get_db
 from app.core.exceptions import AuthenticationError as AuthError
-from app.services.session_service import session_service
 from app.models.user import User
 from app.schemas.oauth import (
     OAuthAccountsListResponse,
@@ -37,6 +36,7 @@ from app.schemas.oauth import (
 from app.schemas.sessions import SessionCreate
 from app.schemas.users import Token
 from app.services.oauth_service import OAuthService
+from app.services.session_service import session_service
 from app.utils.device import extract_device_info
 
 router = APIRouter()

backend/app/api/routes/organizations.py

@@ -16,7 +16,6 @@ from app.api.dependencies.auth import get_current_user
 from app.api.dependencies.permissions import require_org_admin, require_org_membership
 from app.core.database import get_db
 from app.models.user import User
-from app.services.organization_service import organization_service
 from app.schemas.common import (
     PaginatedResponse,
     PaginationParams,
@@ -27,6 +26,7 @@ from app.schemas.organizations import (
     OrganizationResponse,
     OrganizationUpdate,
 )
+from app.services.organization_service import organization_service
 
 logger = logging.getLogger(__name__)
 

backend/app/api/routes/sessions.py

@@ -18,9 +18,9 @@ from app.core.auth import decode_token
 from app.core.database import get_db
 from app.core.exceptions import AuthorizationError, ErrorCode, NotFoundError
 from app.models.user import User
-from app.services.session_service import session_service
 from app.schemas.common import MessageResponse
 from app.schemas.sessions import SessionListResponse, SessionResponse
+from app.services.session_service import session_service
 
 router = APIRouter()
 logger = logging.getLogger(__name__)

backend/app/api/routes/users.py

@@ -13,7 +13,7 @@ from sqlalchemy.ext.asyncio import AsyncSession
 
 from app.api.dependencies.auth import get_current_superuser, get_current_user
 from app.core.database import get_db
-from app.core.exceptions import AuthorizationError, ErrorCode, NotFoundError
+from app.core.exceptions import AuthorizationError, ErrorCode
 from app.models.user import User
 from app.schemas.common import (
     MessageResponse,
@@ -107,7 +107,9 @@ async def list_users(
     """,
     operation_id="get_current_user_profile",
 )
-async def get_current_user_profile(current_user: User = Depends(get_current_user)) -> Any:
+async def get_current_user_profile(
+    current_user: User = Depends(get_current_user),
+) -> Any:
     """Get current user's profile."""
     return current_user