refactor: reorganize backend module boundaries

app/runtime/thread.py

@@ -0,0 +1,30 @@
+from concurrent.futures import ThreadPoolExecutor
+
+from app.runtime.config import settings
+from app.foundation.singleton import Singleton
+
+
+class ThreadHelper(metaclass=Singleton):
+    """
+    线程池管理
+    """
+    def __init__(self):
+        """按系统配置创建共享后台线程池。"""
+        self.pool = ThreadPoolExecutor(max_workers=settings.CONF.threadpool)
+
+    def submit(self, func, *args, **kwargs):
+        """
+        提交任务
+        :param func: 函数
+        :param args: 参数
+        :param kwargs: 参数
+        :return: future
+        """
+        return self.pool.submit(func, *args, **kwargs)
+
+    def shutdown(self):
+        """
+        关闭线程池
+        :return:
+        """
+        self.pool.shutdown()