feat: add prompt opening behavior modes

backend/services/pipecat/pipeline_events.py

@@ -161,6 +161,9 @@ def bind_cascade_pipeline_events(
 
     @assistant_aggregator.event_handler("on_interruption_processed")
     async def on_interruption_processed(_aggregator):
+        brain_handler = getattr(brain, "on_interruption_processed", None)
+        if callable(brain_handler):
+            await brain_handler()
         if client_tools is not None:
             client_tools.on_interruption_processed()
         if not pending_user_inputs: