Update model card: add ViT, full 6-model benchmarks, architecture diagrams

Upload vit best.pt [20260406] — ViT 7.4M params, best rain AUC 0.776

Update Model Card with full documentation

Upload stripped ResNet-18 checkpoint (45MB)

Upload stripped CNN Baseline checkpoint (45MB)

Remove course reference from model card

Remove course reference from model card

Add model card with architecture and usage details

Upload norm_stats.pt [20260315]

Upload cnn_baseline_27ep-baseline best.pt [20260315] — val_loss=0.6207 AUC=0.739 epoch15

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