缺少security-check模块，

H:\ComfyUI\CF\ComfyUI_windows_portable>.\python_embeded\python.exe -s ComfyUI\main.py --windows-standalone-build --force-fp16
Failed to execute startup-script: H:\ComfyUI\CF\ComfyUI_windows_portable\ComfyUI\custom_nodes\ComfyUI-Manager\prestartup_script.py / module 'security_check' has no attribute 'security_check'

Prestartup times for custom nodes:
0.0 seconds: H:\ComfyUI\CF\ComfyUI_windows_portable\ComfyUI\custom_nodes\rgthree-comfy
0.3 seconds (PRESTARTUP FAILED): H:\ComfyUI\CF\ComfyUI_windows_portable\ComfyUI\custom_nodes\ComfyUI-Manager

Start by reproducing the Windows standalone command and inspect ComfyUI-Manager/prestartup_script.py, especially its use of the security_check module. Determine why the reported security_check attribute is unavailable and confirm the manager startup completes without the PRESTARTUP FAILED error.

Written by the indexing model from the issue text.