Describe the bug
The fields in the sessions table are never getting updated. For examplelastUpdateTime sticks to the time the session was created, and theevents field is not updated if new messages are sent.

To Reproduce

1. Create a session
2. Send a few messages
3. Inspect the the sessions via API(/apps/{app_name}/users/{user_id}/sessions) or in my case also via SQL query because I use a DatabaseSessionService (AlloyDB).

Expected behavior
ThelastUpdateTime field should be updated with the timestamp of the last message and theevents should contain the sessions events.

• Python version: 3.11
• ADK version: 1.11.0