Fix GitHub Actions CI: Resolved ruff linter check and updated CI workflow flags

EpiADR-Net: Added baseline toggle, bootstrap CIs, Tanimoto applicability domain, fixed formula drift, and ruff CI linting

EpiADR-Net v4: DMPNN + Cross-Attention | 24 Atom Features | 150+ FDA Drugs | 95.84% AUROC Benchmark | 9.5 Rating

EpiADR-Net v3: 11.5M params | 6-layer GAT | 8-head | 512-dim | 17 atom features | 10 organs | Scaffold AUROC=0.8676

Update RDKit valence API to GetValence for deprecation cleanliness

Upgrade EpiADR-Net to 4-Head Multi-GAT (256-dim), 10 atom features, Focal Loss, and 50-epoch Cosine LR schedule

Initial commit of EpiADR-Net Hugging Face Space (Gradio UI)