fix：修复类属性优先级问题

src/plugin_system/base/base_action.py

@@ -376,7 +376,7 @@ class BaseAction(ABC):
             keyword_case_sensitive=getattr(cls, "keyword_case_sensitive", False),
             mode_enable=get_mode_value("mode_enable", "all"),
             parallel_action=getattr(cls, "parallel_action", True),
-            random_activation_probability=getattr(cls, "random_activation_probability", 0.0),
+            random_activation_probability=getattr(cls, "random_activation_probability", 0.3),
             llm_judge_prompt=getattr(cls, "llm_judge_prompt", ""),
             # 使用正确的字段名
             action_parameters=getattr(cls, "action_parameters", {}).copy(),