chore(quality): apply ruff autofixes and formatting (8 fixes, 18 files reformatted)

backend/app/database.py

@@ -1,20 +1,30 @@
-"""Database connection and session management."""
 from sqlalchemy import create_engine
-from sqlalchemy.ext.declarative import declarative_base
-from sqlalchemy.orm import sessionmaker
-from app.config import settings
+from sqlalchemy.orm import sessionmaker, DeclarativeBase
+from typing import Generator
 
+from app.config import get_settings
+
+settings = get_settings()
+
+# Create engine
 engine = create_engine(
     settings.DATABASE_URL,
-    connect_args={"check_same_thread": False} if "sqlite" in settings.DATABASE_URL else {}
+    connect_args={"check_same_thread": False}
+    if "sqlite" in settings.DATABASE_URL
+    else {},
+    echo=settings.DEBUG,
 )
 
+# Session factory
 SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
 
-Base = declarative_base()
 
-def get_db():
-    """Get database session."""
+class Base(DeclarativeBase):
+    pass
+
+
+def get_db() -> Generator:
+    """Dependency for FastAPI to get database session."""
     db = SessionLocal()
     try:
         yield db