feat(v9): sub-tokenization — [UNK] collisions fixed + namespace probe passes + apiVersion probe added

deploy: v8 mainline (post-cleanup) — renamed v8_model to model, v7 archived

suggest: re-push with empty-parent + None-value handling

infer: kind-condition kind_head predictions (mask non-matching-kind logits before softmax)

Initial app: Gradio missing-field suggester (v6.1 model)