feat(promote-customer-spec): Phase A — recipe + spec foundation

- Add fp.recipe.thickness model (replaces fp.coating.thickness, scoped to recipe root)
- Add spec metadata + bake-relief fields to fusion.plating.process.node (recipe root):
  phosphorus_level, thickness_min/max/uom, thickness_option_ids,
  requires_bake_relief + bake_window_hours/temperature/duration
- Add recipe_ids M2M + print_on_cert to fusion.plating.customer.spec
- Add applicable_spec_ids reverse M2M as inherit in fusion_plating_quality
  (avoids circular dep — core can't reference customer.spec which lives in quality)
- Surface new fields on recipe form ("Specification & Bake" notebook page)
- Surface recipe linkage on customer spec form

Pure additive. Foundation for Phases B-E.

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

fusion_plating/fusion_plating_quality/__manifest__.py

@@ -5,7 +5,7 @@
 
 {
     'name': 'Fusion Plating — Quality (QMS)',
-    'version': '19.0.4.14.0',
+    'version': '19.0.5.0.0',
     'category': 'Manufacturing/Plating',
     'summary': 'Native QMS for plating shops: NCR, CAPA, calibration, AVL, FAIR, '
                'internal audits, customer specs, document control. CE + EE compatible.',
@@ -90,6 +90,7 @@ Copyright (c) 2026 Nexa Systems Inc. All rights reserved.
         'views/fp_calibration_views.xml',
         'views/fp_avl_views.xml',
         'views/fp_customer_spec_views.xml',
+        'views/fp_process_node_inherit_views.xml',
         'views/fp_audit_views.xml',
         'views/fp_fair_views.xml',
         'views/fp_doc_control_views.xml',