asyncgenerator fix

docs/skills/async-fastapi-sqlmodel/references/session.md

@@ -130,7 +130,7 @@ Otherwise, a later call can return a maker that still references the old engine
 A small [`asynccontextmanager`](https://docs.python.org/3/library/contextlib.html#contextlib.asynccontextmanager) can make repository methods composable. It borrows an existing session when supplied; otherwise it creates and closes one from a supplied factory:
 
 ```python
-from collections.abc import AsyncIterator
+from collections.abc import AsyncGeneratorr
 from contextlib import asynccontextmanager
 
 
@@ -139,7 +139,7 @@ async def session_scope(
     *,
     database_url: str,
     session: AsyncSession | None = None,
-) -> AsyncIterator[AsyncSession]:
+) -> AsyncGenerator[AsyncSession]:
     if session is not None:
         yield session
         return
@@ -172,7 +172,7 @@ async def transaction_scope(
     *,
     database_url: str,
     session: AsyncSession | None = None,
-) -> AsyncIterator[AsyncSession]:
+) -> AsyncGenerator[AsyncSession]:
     if session is not None:
         if not session.in_transaction():
             raise RuntimeError("A supplied session must have an active transaction")
@@ -277,7 +277,7 @@ This preserves atomicity without making repository objects hold mutable `AsyncSe
 ## Canonical FastAPI Dependency Pattern
 
 ```python
-from collections.abc import AsyncIterator
+from collections.abc import AsyncGenerator
 
 from fastapi import Depends
 from fastapi import Request
@@ -294,7 +294,7 @@ def resolve_session_factory(request: Request) -> SessionFactory:
 
 async def get_db_session(
     session_factory: SessionFactory = Depends(resolve_session_factory),
-) -> AsyncIterator[AsyncSession]:
+) -> AsyncGenerator[AsyncSession]:
     async with session_factory() as session:
         yield session
 ```