refactor：Module加入执行优先顺序

app/modules/transmission/__init__.py

@@ -37,6 +37,13 @@ class TransmissionModule(_ModuleBase, _DownloaderBase[Transmission]):
         """
         return ModuleType.Downloader
 
+    @staticmethod
+    def get_priority() -> int:
+        """
+        获取模块优先级，数字越小优先级越高，只有同一接口下优先级才生效
+        """
+        return 2
+
     def stop(self):
         pass