refactor(global_data): 将锁类型从Lock改为RLock

- 将 threading.Lock() 替换为 threading.RLock() 以支持可重入锁定
- 添加注释说明原代码和修改原因
- 保持全局实例创建不变

global_data.py

@@ -11,7 +11,8 @@ class GlobalData:
     def _init(self):
         """初始化全局字典和锁"""
         self._global_dict = {}
-        self._lock = threading.Lock()
+        #self._lock = threading.Lock() # 原代码
+        self._lock = threading.RLock()  # 使用可重入锁
 
     def set_value(self, name, value):
         """设置全局值"""