🔧(backend) update egress worker layout for screen recording

Modify screen recording layout to focus on active speaker or shared screen
content. Provides better recording quality by prioritizing relevant visual
elements. Temporary solution until custom visio template is implemented.

src/backend/core/recording/worker/services.py

@@ -101,8 +101,7 @@ class VideoCompositeEgressService(BaseEgressService):
         )
 
         request = livekit_api.RoomCompositeEgressRequest(
-            room_name=room_name,
-            file_outputs=[file_output],
+            room_name=room_name, file_outputs=[file_output], layout="speaker-light"
         )
 
         response = self._handle_request(request, "start_room_composite_egress")