阶段3: 摘除 STF——删除 stf_client/stf_device_mgmt 与全部引用（STF 容器重启/设备管理/强制释放占用/agent 按钮/占用列），调度与设备管理完全基于本地设备池+adb；错误类迁入 device_worker，create_worker 去 stf 参数

tasks/douyin/task.py

@@ -52,8 +52,8 @@ class DouyinNurtureWorker(BaseWorker):
     操作参数优先级：任务 params.actions > 本文件 DEFAULT_PARAMS.actions。
     """
 
-    def __init__(self, stf_client, serial, params=None):
-        super().__init__(stf_client, serial, params)
+    def __init__(self, serial, params=None):
+        super().__init__(serial, params)
         p = {**DEFAULT_PARAMS, **(self.params or {})}
         self.watch_count = int(p["watch_count"])
         self.watch_min = float(p["watch_min"])
@@ -244,7 +244,7 @@ class DouyinNurtureTask(BaseTask):
         """按 action_type 取抖音操作类。"""
         return get_action_class(action_type)
 
-    def create_worker(self, stf, serial, params):
+    def create_worker(self, serial, params):
         merged = {**DEFAULT_PARAMS, **(params or {})}
         # actions 字段深合并（参数级，保留前端没传的操作默认值）
         # 确保即使前端只传 actions.like.enabled，like.params.rate 也能拿到默认 0.3
@@ -266,4 +266,4 @@ class DouyinNurtureTask(BaseTask):
                 merged_cfg["params"] = merged_params
                 merged_actions[atype] = merged_cfg
         merged["actions"] = merged_actions
-        return DouyinNurtureWorker(stf, serial, params=merged)
+        return DouyinNurtureWorker(serial, params=merged)