fix: make wrapper kw-only in async_sqlite_session per seratch feedback

Author: HuxleyHu98

src/agents/extensions/memory/async_sqlite_session.py

@@ -106,6 +106,7 @@ async def _locked_connection(self) -> AsyncIterator[aiosqlite.Connection]:
     async def get_items(
         self,
         limit: int | None = None,
+        *,
         wrapper: RunContextWrapper[Any] | None = None,
     ) -> list[TResponseInputItem]:
         """Retrieve the conversation history for this session.
@@ -158,6 +159,7 @@ async def get_items(
     async def add_items(
         self,
         items: list[TResponseInputItem],
+        *,
         wrapper: RunContextWrapper[Any] | None = None,
     ) -> None:
         """Add new items to the conversation history.