chore: 优化 AI-Core 启动脚本

- 更新 start.bat 和 start.sh 启动脚本
- 优化 gRPC 服务器配置

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

ai-core/service/grpc_server.py

@@ -222,7 +222,7 @@ def serve(port: int = 50051, max_workers: int = 10):
         server=server,
     )
 
-    server.add_insecure_port(f"[::]:{port}")
+    server.add_insecure_port(f"0.0.0.0:{port}")
     server.start()
 
     logger.info("DocumentParser gRPC server (MarkItDown) started on port %d", port)