init: documentation and prototypes

prototype-grok4.1/direktvermittlungde-backend/database.py

@@ -0,0 +1,11 @@
+from sqlalchemy.ext.asyncio import async_sessionmaker, create_async_engine
+from .models import Base
+
+DATABASE_URL = "postgresql+asyncpg://user:pass@localhost/dvd_db"  # From env
+
+engine = create_async_engine(DATABASE_URL, echo=True)
+async_session = async_sessionmaker(engine, class_=AsyncSession, expire_on_commit=False)
+
+async def init_db():
+    async with engine.begin() as conn:
+        await conn.run_sync(Base.metadata.create_all)