diffusers safetensors stable-diffusion sdxl ssd-1b flash sdxl-flash sdxl-flash-mini distilled lightning turbo lcm hyper fast fast-sdxl sd-community text-to-image base_model:stabilityai/stable-diffusion-xl-base-1.0 base_model:finetune:stabilityai/stable-diffusion-xl-base-1.0 license:creativeml-openrail-m region:us