feat：提供方法让HFC结束，当等待过久no_reply，会回到ABSENT模式

src/heart_flow/background_tasks.py

@@ -112,15 +112,6 @@ class BackgroundTaskManager:
                 f"兴趣评估任务已启动 间隔:{self.interest_eval_interval}s",
                 "_interest_eval_task",
             ),
-            # 新增随机停用任务配置
-            (
-                self._random_deactivation_task,
-                self._run_random_deactivation_cycle,
-                "hf_random_deactivation",
-                "debug",  # 设为debug，避免过多日志
-                f"随机停用任务已启动 间隔:{self.random_deactivation_interval}s",
-                "_random_deactivation_task",
-            ),
         ]
 
         # 统一启动所有任务
@@ -264,10 +255,6 @@ class BackgroundTaskManager:
 
     # --- 结束新增 ---
 
-    # --- 新增随机停用工作函数 ---
-    async def _perform_random_deactivation_work(self):
-        """执行一轮子心流随机停用检查。"""
-        await self.subheartflow_manager.randomly_deactivate_subflows()
 
     # --- 结束新增 ---
 
@@ -300,15 +287,3 @@ class BackgroundTaskManager:
             task_func=self._perform_interest_eval_work,
         )
 
-    # --- 结束新增 ---
-
-    # --- 新增随机停用任务运行器 ---
-    async def _run_random_deactivation_cycle(self):
-        """运行随机停用循环。"""
-        await self._run_periodic_loop(
-            task_name="Random Deactivation",
-            interval=self.random_deactivation_interval,
-            task_func=self._perform_random_deactivation_work,
-        )
-
-    # --- 结束新增 ---