feat(fusion_plating): kind.area_kind drives Shop Floor column routing

Add required area_kind Selection to fp.step.kind so each kind
self-declares which plant-view column its steps belong in. Replaces
the hardcoded _STEP_KIND_TO_AREA dict (removed in fp_job_step.py
in the follow-up commit).

- New `blast` kind for the Blasting column (sequence=35)
- 26 existing kind records seeded with area_kind in XML
- Pre-migrate 19.0.21.2.0 seeds existing rows BEFORE NOT NULL hits
  the schema; also activates derack/demask/gating that were
  deactivated in 19.0.20.6.0 but are needed for the full taxonomy
- Step Kind form + list views surface area_kind (badge + chip)
- Step Kind search adds Group By Shop Floor Column
- Simple Editor kind picker shows "Masking — Masking column"
  suffix so authors see the routing at pick time
- Add Hot Water Porosity Test (A-15) + Final Inspection / Packaging
  templates (used by 7+3 recipe nodes that previously had no
  library entry)

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

fusion_plating/fusion_plating/models/fp_step_kind.py

@@ -34,6 +34,32 @@ class FpStepKind(models.Model):
         string='Icon',
         default='fa-cog',
     )
+    # 2026-05-24 — Shop Floor live-step fix.
+    # Each kind self-declares which plant-view column its steps land in.
+    # Replaces the hardcoded _STEP_KIND_TO_AREA dict (removed from
+    # fusion_plating_jobs/models/fp_job_step.py). Pre-migrate
+    # 19.0.21.2.0 seeds existing rows before NOT NULL hits the schema.
+    area_kind = fields.Selection(
+        [
+            ('receiving',  'Receiving'),
+            ('masking',    'Masking'),
+            ('blasting',   'Blasting'),
+            ('racking',    'Racking'),
+            ('plating',    'Plating'),
+            ('baking',     'Baking'),
+            ('de_racking', 'De-Racking'),
+            ('inspection', 'Final Inspection'),
+            ('shipping',   'Shipping'),
+        ],
+        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 '
+             'what gates fire AND where the card lives.',
+    )
     company_id = fields.Many2one(
         'res.company', string='Company',
         default=lambda self: self.env.company,