fix: await message confirmation interruption

backend/tests/test_brains.py

@@ -8,7 +8,6 @@ from unittest.mock import AsyncMock, patch
 from models import AssistantConfig, RuntimeTool
 from pipecat.flows import FlowManager
 from pipecat.frames.frames import (
-    InterruptionFrame,
     LLMContextFrame,
     LLMFullResponseEndFrame,
     LLMFullResponseStartFrame,
@@ -1536,14 +1535,15 @@ class WorkflowBrainTests(unittest.IsolatedAsyncioTestCase):
         async def queue_frame(frame):
             if isinstance(frame, TTSSpeakFrame):
                 events.append(("speech", frame.text))
-            elif isinstance(frame, InterruptionFrame):
-                events.append("interrupted")
             elif (
                 isinstance(frame, OutputTransportMessageUrgentFrame)
                 and frame.message.get("event") == "message_completed"
             ):
                 events.append("message_completed")
 
+        async def interrupt_output():
+            events.append("interrupted")
+
         class OrderedCallEnd(FakeCallEnd):
             def __init__(self):
                 super().__init__()
@@ -1580,6 +1580,7 @@ class WorkflowBrainTests(unittest.IsolatedAsyncioTestCase):
             call_end=call_end,
             client_tools=client_tools,
             set_input_enabled=input_states.append,
+            interrupt_output=interrupt_output,
         )
         brain._message_stages.set_client_tools(client_tools)