Update model card metadata and benchmark provenance

README.md

@@ -144,6 +144,8 @@ print("Anger score:   ", results["anger"].score)
 | `tokenizer.json`, `tokenizer_config.json` | Tokenizer with ClassOne delimiter tokens |
 | `classone_heads.pt` | Trained Noul / Choice / Score head weights + calibrated temperatures |
 
+> **Certified `classone_heads.pt` SHA256:** `F6A6E42365158D99807B8995C800429A0BD2B12755EDC1DEC5823400D35F337D`
+
 ## Citation
 
 ```bibtex