feat(jobs): add fp.work.centre native model

Replaces mrp.workcenter for plating. Domain-specific kinds
(wet_line/bake/mask/rack/inspect/other) drive release-ready
validation on steps. ACLs follow existing supervisor/manager
hierarchy.

Note: spec listed default_oven_id Many2one to fusion.plating.oven
but that model does not exist in core (the bake-oven model
fusion.plating.bake.oven lives in fusion_plating_shopfloor, which
core cannot depend on). Field omitted; the bridge that adds
fp.job/fp.job.step can re-introduce it via _inherit later.

Part of: native job model migration (spec 2026-04-25)
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

fusion_plating/fusion_plating/__manifest__.py

@@ -5,7 +5,7 @@
 
 {
     'name': 'Fusion Plating',
-    'version': '19.0.8.0.0',
+    'version': '19.0.8.1.0',
     'category': 'Manufacturing/Plating',
     'summary': 'Core plating / metal finishing ERP: facilities, processes, tanks, baths, jobs, operators.',
     'description': """