diffusers

b70a9404 - [lora training] compute aspect-ratio buckets on the fly; drop --bucket_no_upscale

[lora training] compute aspect-ratio buckets on the fly; drop --bucket_no_upscale Gate bucketing behind --use_aspect_ratio_buckets (an explicit --aspect_ratio_buckets list also enables it). Without a list, buckets are computed on the fly from --resolution and capped to each image's own resolution, so smaller images are assigned to a smaller bucket instead of being upscaled or padded. Flux Kontext seeds the ladder from its preferred resolutions. Skip the opt-in bucketing/caption-dropout tests for now.