W28 - Model ops & eval console (admin)

The governance screen the v4 LLM decision demands: active base model and LoRA adapter version, held-out rubric scores side-by-side against the hosted-API baseline (the comparison the adapter escape hatch enables), GPU cost vs. estimated API spend, per-surface human feedback rates (W23/W25/W26), drift alerts, and the retune queue with rollback targets.