feat: add few more logging statements

Author: ksachdeva

adk-chatkit/src/adk_chatkit/_store.py

@@ -212,6 +212,7 @@ async def add_thread_item(self, thread_id: str, item: ThreadItem, context: ADKCo
             actions=actions_with_update,
             timestamp=datetime.now().timestamp(),
         )
+        _LOGGER.info(f"Appending system event to session {session.id} for adding thread item {item.id}")
         await self._session_service.append_event(session, system_event)
 
     async def save_attachment(self, attachment: Attachment, context: ADKContext) -> None:

examples/backend/src/backend/_refreshed_session_service.py

@@ -1,22 +1,27 @@
+import logging
 from typing import Any
 
 from google.adk.events import Event
 from google.adk.sessions import Session
 from google.adk.sessions.database_session_service import DatabaseSessionService
 
+_LOGGER = logging.getLogger(__name__)
+
 
 class RefreshedSessionService(DatabaseSessionService):
     def __init__(self, db_url: str, **kwargs: Any) -> None:
         super().__init__(db_url, **kwargs)
 
     async def append_event(self, session: Session, event: Event) -> Event:
         """Append event with session refresh to prevent stale session errors."""
+        _LOGGER.info("Appending event to session %s", session.id)
         # Refresh the session before appending to get the latest state
         refreshed_session = await self.get_session(
             app_name=session.app_name, user_id=session.user_id, session_id=session.id
         )
 
         if refreshed_session:
+            _LOGGER.info("Session %s refreshed before appending event ", session.id)
             session.last_update_time = refreshed_session.last_update_time
             session.events = refreshed_session.events
             session.state = refreshed_session.state