Document token_gate/ (G3b token-aware causal gate)

Add G3b token-aware causal gate (token_gate/)

Upload embed_gate_mlp.joblib with huggingface_hub

Add model card (R2: CNC + 6-lang synthetic, causal gate)

Keep model files only; remove eval artifacts

Add causal span model (mDeBERTa-v3 BIO tagger)

initial commit