qector-reproducibility

Reproducibility and claim boundaries for QECTOR (manual 19, 22, 27, Appendix D). Covers the chapter 22.3 required-artifact metadata, the safe / unsafe wording rule (manual 22.5), the reproduction commands in Appendix D, the competitive-harness pipeline (same Stim circuit, same samples, same DEM, same observable scoring), the withdrawn benchmark policy, and the hot/cold path label. Load for any question about how to…