style: apply ruff formatting to source and test files

app/infrastructure/database/connection.py

@@ -1,7 +1,7 @@
 """Database connection and session management."""
 
+from collections.abc import AsyncGenerator
 from contextlib import asynccontextmanager
-from typing import AsyncGenerator
 
 from sqlalchemy.ext.asyncio import (
     AsyncEngine,
@@ -38,7 +38,7 @@ AsyncSessionLocal = async_sessionmaker(
 )
 
 
-async def get_session() -> AsyncGenerator[AsyncSession, None]:
+async def get_session() -> AsyncGenerator[AsyncSession]:
     """Get database session."""
     async with AsyncSessionLocal() as session:
         try:
@@ -48,7 +48,7 @@ async def get_session() -> AsyncGenerator[AsyncSession, None]:
 
 
 @asynccontextmanager
-async def get_session_context() -> AsyncGenerator[AsyncSession, None]:
+async def get_session_context() -> AsyncGenerator[AsyncSession]:
     """Get database session as context manager."""
     async with AsyncSessionLocal() as session:
         try: