feat(memory): replace Mem0 with local RAG using SQLite, ChromaDB, and bge-small

api/chat_service.py

@@ -13,7 +13,7 @@ from config import (
     MEM0_CONFIG,
 )
 from api.doubao_tts import text_to_speech
-from memory_module.memory_integration import Mem0Integration
+from memory_module import LocalMemoryIntegration
 
 logger = logging.getLogger(__name__)
 
@@ -21,7 +21,7 @@ logger = logging.getLogger(__name__)
 class ChatService:
     def __init__(self, user_id: str = None):
         self.user_id = user_id or DEFAULT_USER_ID
-        self.mem0_integration = Mem0Integration(MEM0_CONFIG)
+        self.mem0_integration = LocalMemoryIntegration(MEM0_CONFIG) # 使用新类
         self._initialized = False
     
     def initialize(self):