fix: protege limpeza da sessão após desconexão

pyproject.toml

@@ -5,6 +5,7 @@ description = "Realtime voice assistant with WebSocket audio gateway, streaming
 readme = "README.md"
 requires-python = ">=3.12"
 dependencies = [
+    "anyio>=4.15.1,<5",
     "deepagents>=0.7.26",
     "fastapi>=0.141.1",
     "httpx>=0.28,<1",

src/voice_assistant/audio_gateway/app/main.py

@@ -35,6 +35,7 @@ Architecture:
 import json
 import logging
 from pathlib import Path
+import anyio
 
 from fastapi.responses import FileResponse
 from fastapi.staticfiles import StaticFiles
@@ -1044,6 +1045,7 @@ async def audio_socket(websocket: WebSocket) -> None:
         pass
 
     finally:
+        with anyio.CancelScope(shield=True):
             # Stop Gateway-owned finalization before provider cleanup.
             try:
                 await cancel_finalization_task()
@@ -1063,8 +1065,7 @@ async def audio_socket(websocket: WebSocket) -> None:
                         session.session_id if session else None,
                     )
 
-        # A task may have been created before registration failed.
-        # Handle it independently if the pipeline does not own it.
+            # Handle tasks created before pipeline registration.
             if stt_events_task is not None:
                 task = stt_events_task
 
@@ -1100,6 +1101,7 @@ async def audio_socket(websocket: WebSocket) -> None:
 
                     if task.done():
                         stt_events_task = None
+
             # Abort STT without waiting for a final transcript.
             if stt is not None:
                 try:
@@ -1133,4 +1135,3 @@ async def audio_socket(websocket: WebSocket) -> None:
                     )
                 finally:
                     agent = None
-

uv.lock

@@ -2924,6 +2924,7 @@ name = "voice-assistant"
 version = "0.1.0"
 source = { editable = "." }
 dependencies = [
+    { name = "anyio" },
     { name = "deepagents" },
     { name = "fastapi" },
     { name = "httpx" },
@@ -2946,6 +2947,7 @@ dev = [
 
 [package.metadata]
 requires-dist = [
+    { name = "anyio", specifier = ">=4.15.1,<5" },
     { name = "deepagents", specifier = ">=0.7.26" },
     { name = "fastapi", specifier = ">=0.141.1" },
     { name = "httpx", specifier = ">=0.28,<1" },