Initial lightweight AI agent admin

backend/app/core/database.py

@@ -0,0 +1,26 @@
+from collections.abc import AsyncGenerator
+
+from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
+from sqlalchemy.orm import DeclarativeBase
+
+from app.core.config import settings
+
+
+class Base(DeclarativeBase):
+    pass
+
+
+engine = create_async_engine(
+    settings.database_url,
+    echo=settings.debug,
+    pool_pre_ping=True,
+    pool_size=5,
+    max_overflow=10,
+)
+
+AsyncSessionLocal = async_sessionmaker(engine, class_=AsyncSession, expire_on_commit=False)
+
+
+async def get_db() -> AsyncGenerator[AsyncSession, None]:
+    async with AsyncSessionLocal() as session:
+        yield session