feat(fusion_plating_jobs): de-rack/bake area_kind name override + rack-load Phase 1

- _compute_area_kind: name-based override so de-rack/de-mask steps land in the
  De-Racking column and bake/oven steps in Baking, regardless of a mis-tagged
  recipe kind (fixed WO cards scattering into the wrong shop-floor columns).
- fp.rack.load jobs extension: racking-step resolution by area_kind (not the
  corrupt kind), equal-split/override ops, fp.job qty_racked/unracked rollups,
  and independent rack movement (per-line moves) + de-racking unrack.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

fusion_plating/fusion_plating_jobs/__manifest__.py

@@ -3,7 +3,7 @@
 # License OPL-1 (Odoo Proprietary License v1.0)
 {
     'name': 'Fusion Plating — Native Jobs',
-    'version': '19.0.11.5.0',
+    'version': '19.0.12.0.1',
     'category': 'Manufacturing/Plating',
     'summary': 'Native plating job model — replaces mrp.production / mrp.workorder bridge.',
     'author': 'Nexa Systems Inc.',