fix: add scikit-learn==1.8.0, add clf debug logging

fix: add scikit-learn==1.8.0, add clf debug logging

fix: add joblib to requirements.txt for vertical classifier

feat: vertical classifier — auto-detect vertical in /score

fix: self.clip → self.backbone in forward(), stale comment

feat: swap backbone from CLIP to SigLIP 2 (google/siglip2-base-patch16-224)

fix: upgrade torch to 2.5.1+cpu to match transformers 5.8.1 requirement

fix: pin transformers and huggingface-hub to local working versions

fix: libglib2.0-0, remove stale curl file, processor passthrough, trim requirements

fix: load CLIP processor from openai repo directly

debug: add model load logging

fix: HF Spaces colorTo value

Slice 3: initial deploy