fix：hfc现在会在FOCUS下持续运行，有小概率掉出FOCUS模式

src/heart_flow/background_tasks.py

@@ -16,6 +16,8 @@ background_tasks_log_config = LogConfig(
 
 logger = get_module_logger("background_tasks", config=background_tasks_log_config)
 
+# 新增随机停用间隔 (5 分钟)
+RANDOM_DEACTIVATION_INTERVAL_SECONDS = 300
 # 新增兴趣评估间隔
 INTEREST_EVAL_INTERVAL_SECONDS = 5
 
@@ -35,6 +37,8 @@ class BackgroundTaskManager:
         inactive_threshold: int,
         # 新增兴趣评估间隔参数
         interest_eval_interval: int = INTEREST_EVAL_INTERVAL_SECONDS,
+        # 新增随机停用间隔参数
+        random_deactivation_interval: int = RANDOM_DEACTIVATION_INTERVAL_SECONDS,
     ):
         self.mai_state_info = mai_state_info
         self.mai_state_manager = mai_state_manager
@@ -47,19 +51,21 @@ class BackgroundTaskManager:
         self.log_interval = log_interval
         self.inactive_threshold = inactive_threshold  # For cleanup task
         self.interest_eval_interval = interest_eval_interval  # 存储兴趣评估间隔
+        self.random_deactivation_interval = random_deactivation_interval # 存储随机停用间隔
 
         # Task references
         self._state_update_task: Optional[asyncio.Task] = None
         self._cleanup_task: Optional[asyncio.Task] = None
         self._logging_task: Optional[asyncio.Task] = None
         self._interest_eval_task: Optional[asyncio.Task] = None  # 新增兴趣评估任务引用
+        self._random_deactivation_task: Optional[asyncio.Task] = None # 新增随机停用任务引用
         self._tasks: List[Optional[asyncio.Task]] = []  # Keep track of all tasks
 
     async def start_tasks(self):
         """启动所有后台任务
 
         功能说明:
-        - 启动核心后台任务: 状态更新、清理、日志记录和兴趣评估
+        - 启动核心后台任务: 状态更新、清理、日志记录、兴趣评估和随机停用
         - 每个任务启动前检查是否已在运行
         - 将任务引用保存到任务列表
         """
@@ -99,6 +105,15 @@ 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
@@ -230,6 +245,12 @@ 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 ---
+
     # --- Specific Task Runners --- #
     async def _run_state_update_cycle(self, interval: int):
         await self._run_periodic_loop(
@@ -255,3 +276,14 @@ class BackgroundTaskManager:
         )
 
     # --- 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 ---