Cleanup duplex pipeline

engine/core/duplex_pipeline.py

@@ -13,23 +13,24 @@ event-driven design.
 
 import asyncio
 import time
-from typing import Optional, Callable, Awaitable, Dict, Any
+from typing import Any, Dict, Optional
+
 import numpy as np
 from loguru import logger
 
-from core.transports import BaseTransport
+from app.config import settings
 from core.conversation import ConversationManager, ConversationState
 from core.events import get_event_bus
-from processors.vad import VADProcessor, SileroVAD
-from processors.eou import EouDetector
-from services.base import BaseLLMService, BaseTTSService, BaseASRService
-from services.llm import OpenAILLMService, MockLLMService
-from services.tts import EdgeTTSService, MockTTSService
-from services.asr import BufferedASRService
-from services.siliconflow_tts import SiliconFlowTTSService
-from services.siliconflow_asr import SiliconFlowASRService
-from app.config import settings
+from core.transports import BaseTransport
 from models.ws_v1 import ev
+from processors.eou import EouDetector
+from processors.vad import SileroVAD, VADProcessor
+from services.asr import BufferedASRService
+from services.base import BaseASRService, BaseLLMService, BaseTTSService
+from services.llm import MockLLMService, OpenAILLMService
+from services.siliconflow_asr import SiliconFlowASRService
+from services.siliconflow_tts import SiliconFlowTTSService
+from services.tts import EdgeTTSService, MockTTSService
 
 
 class DuplexPipeline: