v3.18.1

Fixed

• Live temporal-refresh moves from the free wheel to the paid tiers —
  correcting a licence-boundary leak. core/scoring/temporal_refresh.py
  carries a BUSL-1.1 header (it is the paid live web-search refresher), but
  the 3.18.0 open-core re-slice omitted it from the paid manifest, so the
  3.17.0 and 3.18.0 free wheels shipped it by accident — a BUSL module
  physically inside the Apache-2.0 artefact. It now ships only in
  director-ai-pro / director-ai-full. If you relied on
  guard.temporal_refresher (live web-search staleness checking) on a free
  install, it was never licensed for the free tier; it is now a Pro feature
  and a core-only install raises a clear "requires the advanced tier" error
  (the sibling Apache-2.0 temporal_freshness staleness flagger stays
  free). The temporal_consistency property gained the same friendly
  guard. A parity test now fails the build if any BUSL-headered file falls
  outside the paid boundary, so this cannot recur.
• REUSE.toml no longer contradicts the per-file BUSL headers: an explicit
  BUSL-1.1 annotation block was added for the advanced/labs source so a
  reader of REUSE.toml sees the same split the file headers declare
  (reuse lint was already compliant — headers are authoritative).