production_ready: true (sm120 smoke + speed gate passed on d7ada6d build)

Replace layer 43 with same_input fp16-block PV (v4)

Replace layer 43 with v2 initial per-expert fit (v3 expert); PV follows

Publish GLM-5.3 NVFP4 / ARVQ v2 same_input fp16-block hybrid: non-cold structure seed