Nodes:SaveImageWithOptions. This Save Image node allows you to save the image with the checkpoint name as a prefix.
https://github.com/lordgasmic/comfyui_comfyui_save_image_with_options
git clone https://github.com/lordgasmic/comfyui_comfyui_save_image_with_options
comfy node install comfyui-saveimagewithoptions