refactor: improve code formatting and organization across multiple files

backend/app/repositories/__init__.py

@@ -1,8 +1,8 @@
 """Repository abstractions for database access."""
 
 from backend.app.repositories.stations import StationRepository
-from backend.app.repositories.train_schedules import TrainScheduleRepository
 from backend.app.repositories.tracks import TrackRepository
+from backend.app.repositories.train_schedules import TrainScheduleRepository
 from backend.app.repositories.trains import TrainRepository
 from backend.app.repositories.users import UserRepository
 

backend/app/repositories/base.py

@@ -1,8 +1,8 @@
 from __future__ import annotations
 
-import sqlalchemy as sa
 from typing import Generic, Iterable, Optional, Sequence, Type, TypeVar
 
+import sqlalchemy as sa
 from sqlalchemy.orm import Session
 
 from backend.app.db.models import Base

backend/app/repositories/stations.py

@@ -1,13 +1,12 @@
 from __future__ import annotations
 
 import sqlalchemy as sa
+from geoalchemy2.elements import WKTElement
 from sqlalchemy.orm import Session
 
-from geoalchemy2.elements import WKTElement
-
 from backend.app.db.models import Station
-from backend.app.repositories.base import BaseRepository
 from backend.app.models import StationCreate
+from backend.app.repositories.base import BaseRepository
 
 
 class StationRepository(BaseRepository[Station]):

backend/app/repositories/tracks.py

@@ -1,13 +1,14 @@
 from __future__ import annotations
 
+from uuid import UUID
+
 import sqlalchemy as sa
 from geoalchemy2.elements import WKTElement
-from uuid import UUID
 from sqlalchemy.orm import Session
 
 from backend.app.db.models import Track
-from backend.app.repositories.base import BaseRepository
 from backend.app.models import TrackCreate
+from backend.app.repositories.base import BaseRepository
 
 
 class TrackRepository(BaseRepository[Track]):

backend/app/repositories/train_schedules.py

@@ -1,7 +1,8 @@
 from __future__ import annotations
 
-import sqlalchemy as sa
 from uuid import UUID
+
+import sqlalchemy as sa
 from sqlalchemy.orm import Session
 
 from backend.app.db.models import TrainSchedule

backend/app/repositories/trains.py

@@ -1,12 +1,13 @@
 from __future__ import annotations
 
-import sqlalchemy as sa
 from uuid import UUID
+
+import sqlalchemy as sa
 from sqlalchemy.orm import Session
 
 from backend.app.db.models import Train
-from backend.app.repositories.base import BaseRepository
 from backend.app.models import TrainCreate
+from backend.app.repositories.base import BaseRepository
 
 
 class TrainRepository(BaseRepository[Train]):

backend/app/repositories/users.py

@@ -17,11 +17,15 @@ class UserRepository(BaseRepository[User]):
         super().__init__(session)
 
     def get_by_username(self, username: str) -> User | None:
-        statement = sa.select(self.model).where(sa.func.lower(self.model.username) == username.lower())
+        statement = sa.select(self.model).where(
+            sa.func.lower(self.model.username) == username.lower()
+        )
         return self.session.scalar(statement)
 
     def list_recent(self, limit: int = 50) -> list[User]:
-        statement = sa.select(self.model).order_by(self.model.created_at.desc()).limit(limit)
+        statement = (
+            sa.select(self.model).order_by(self.model.created_at.desc()).limit(limit)
+        )
         return list(self.session.scalars(statement))
 
     def create(self, data: UserCreate) -> User: