Init project structure

app/core/database.py

@@ -0,0 +1,17 @@
+"""Database utilities for async SQLAlchemy engine and sessions."""
+from __future__ import annotations
+
+from collections.abc import AsyncGenerator
+
+from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
+
+from app.core.config import settings
+
+engine = create_async_engine(settings.database_url, echo=settings.sqlalchemy_echo)
+AsyncSessionMaker = async_sessionmaker(bind=engine, expire_on_commit=False)
+
+
+async def get_session() -> AsyncGenerator[AsyncSession, None]:
+    """Yield an async database session for request scope."""
+    async with AsyncSessionMaker() as session:
+        yield session