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 '

fusion_plating/fusion_plating_jobs/migrations/19.0.10.25.0/post-migrate.py

@@ -66,7 +66,13 @@ TEMPLATE_BACKFILL = {
 NODE_REPOINTING = [
     ("n.name = 'Blasting'",                                                          'other',  'blast',       'Blasting -> blast'),
     ("n.name ILIKE 'Ready %%'",                                                       None,    'gating',      'Ready For X -> gating'),
-    ("n.name ILIKE '%%De-Masking%%' OR n.name ILIKE '%%DeMasking%%'",                'mask',   'demask',      'De-Masking -> demask'),
+    # De-Masking: anchored ILIKE (must start with "De-Masking" or
+    # "DeMasking") so we don't match "Ready For De-Masking" which the
+    # earlier 'Ready %' rule already moved to gating. cur_code=None
+    # catches both 'mask' (the 34 lazy/legacy ones) and 'other' (4
+    # older nodes never reclassified after the demask kind was added).
+    # The trailing AND k.code != %s safeguard skips already-correct rows.
+    ("(n.name ILIKE 'De-Masking%%' OR n.name ILIKE 'DeMasking%%')",                  None,     'demask',      'De-Masking -> demask'),
     ("n.name = 'Scheduling'",                                                        'other',  'gating',      'Scheduling -> gating'),
     ("n.name ILIKE '%%Nickel Strip%%'",                                              'plate',  'wet_process', 'Nickel Strip -> wet_process'),
     ("n.name ILIKE '%%Pre-Measurement%%' OR n.name ILIKE '%%Check Sulfamate%%'",     'other',  'inspect',     'Pre-Meas/Check Sulfamate -> inspect'),