fix(fusion_plating): tracking warning + De-Masking pattern anchor

- fp.step.kind.area_kind: drop tracking=True (model doesn't inherit
  mail.thread; tracking was a no-op emitting a startup warning).
- Migration 19.0.10.25.0: anchor the De-Masking ILIKE so it doesn't
  wildcard-match "Ready For De-Masking" (which the earlier "Ready %"
  rule already routes to gating). Also drop the cur_code='mask' filter
  so the 4 De-Masking nodes still classified as 'other' get picked up
  on fresh re-runs too.

Direct SQL applied the 4-row fix on entech (post-migrate doesn't
re-run for already-applied versions); this commit keeps fresh
installs and any future re-runs consistent.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

fusion_plating/fusion_plating/models/fp_step_kind.py

@@ -54,7 +54,6 @@ class FpStepKind(models.Model):
         string='Shop Floor Column',
         required=True,
         index=True,
-        tracking=True,
         help='Determines which column on the Shop Floor plant kanban shows '
              'cards whose active step uses this kind. Step kinds drive '
              'routing automatically — picking a kind tells the system both '