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/generic/task.py

@@ -110,8 +110,8 @@ class GenericStepsWorker(BaseWorker):
     只实现 run_task，按步骤类型分发到 _exec_<type> 方法。
     """
 
-    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.max_duration = int(p.get("max_duration", 0))
         self.steps = p.get("steps", [])
@@ -614,9 +614,9 @@ class GenericStepsTask(BaseTask):
     def get_action_class(cls, action_type):
         return None
 
-    def create_worker(self, stf, serial, params):
+    def create_worker(self, serial, params):
         merged = {**DEFAULT_PARAMS, **(params or {})}
-        return GenericStepsWorker(stf, serial, params=merged)
+        return GenericStepsWorker(serial, params=merged)
 
 
 def test_step(serial, step):