Pretrained weights for lucid.models.sk_resnet_18_cls.
Single ImageNet-1k checkpoint (RA_IN1K) converted from
timm/skresnet18.ra_in1k — Wightman's RandAugment recipe, hosted
under huggingface.co/lucid-dl/sk-resnet-18 with the official
acc@1 = 73.020 / acc@5 = 91.172 validation metrics.