A five-vertex counterexample to ferromagnetic Potts censoring — 0.1.0 candidate

Unrefereed exact finite-horizon q=3 counterexample. Three producer-side exact reconstructions and five-role internal editorial acceptance; not external validation, priority, mixing-time improvement or practical speed-up. DOI: 10.5281/zenodo.22546547. The separate Stage-1 ZIP preserves the exact reviewed target; the final package adds DOI identity, CI and editorial records without changing the mathematical Markdown or checker bytes.