improve: significantly speed up the server launching time by async preloading tool providers (#9146)

api/core/tools/tool_manager.py

 import mimetypes
 from collections.abc import Generator
 from os import listdir, path
-from threading import Lock
+from threading import Lock, Thread
 from typing import Any, Optional, Union
 
 from configs import dify_config
             raise ValueError(f"provider type {provider_type} not found")
 
 
-ToolManager.load_builtin_providers_cache()
+# preload builtin tool providers
+Thread(target=ToolManager.load_builtin_providers_cache, name="pre_load_builtin_providers_cache", daemon=True).start()