Optimize: Check realtime mode early in _on_turn_event TurnEndedEvent

- Add early return for realtime mode after logging the event
- Skips unnecessary transcript fetching and participant metadata extraction
- Removes redundant realtime_mode check later in the flow
- Consistent with _on_transcript optimization

Author: d3xvn

agents-core/vision_agents/core/agents/agents.py

@@ -691,6 +691,10 @@ async def _on_turn_event(self, event: TurnStartedEvent | TurnEndedEvent) -> None
                 f"👉 Turn ended - participant {event.speaker_id} finished (duration: {event.duration}, confidence: {event.confidence})"
             )
 
+            # In realtime mode, the LLM handles turn detection and responses itself
+            if self.realtime_mode:
+                return
+            
             # When turn detection is enabled, trigger LLM response when user's turn ends
             # This is the signal that the user has finished speaking and expects a response
             if event.speaker_id and event.speaker_id != self.agent_user.id:
@@ -707,7 +711,7 @@ async def _on_turn_event(self, event: TurnStartedEvent | TurnEndedEvent) -> None
                         participant = event.custom.get('participant')
 
                     # Trigger LLM response with the complete transcript
-                    if not self.realtime_mode and self.llm:
+                    if self.llm:
                         await self.simple_response(transcript, participant)
 
                     # Clear the pending transcript for this speaker