refactor: migrate workflow to v2 core and archive legacy modules

run.py

@@ -47,10 +47,10 @@ def _print_api_info(host: str, port: int):
 def run_websocket(enable_agent: bool):
     """WebSocket 客服模式（默认）"""
     import asyncio
-    from core.websocket_client import QingjianAPIClient
+    from core.websocket_client_v2 import QingjianAPIClient
 
     logger.info("=" * 60)
-    logger.info("AI 客服系统 - WebSocket 模式")
+    logger.info("AI 客服系统 - WebSocket 模式 (新架构 v2)")
     logger.info(f"AI Agent: {'已启用' if enable_agent else '未启用'}")
     logger.info("=" * 60)