fix: match gradio 4.44.0 (HF builder pins .0)

fix: pin huggingface_hub<0.27 for gradio 4.44 compat (HfFolder import)

fix: README colorFrom must be one of allowed palette

feat(space): CPU ONNX runtime build (v9.4, full-song sliding aggregation)

Update README.md

Update README.md

refactor: remove LGBM dependency and rollback to 3-tier verdict

chore: reset repository history - ArtifactNet HF Spaces Demo v8.0