Findings and decisions carry the user challenge's `changes` value; decisions record recommended_basis, origin,
carried_from and chosen_text; validate refuses a complete run with an unsettled gate (ARTIFACT_GATE_UNSETTLED) and
prints attested=<n>. The gate reply grammar gains `all as-is` and resolves partial replies against prior answers
(field wave B2a/B2b).
Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>