fix(jobs): drop display_name override on workflow state — pills showed 'Name [code]'

The compute appended '[code]' so admin pages could disambiguate
states at a glance. But display_name is what the status-bar widget
uses to render each pill, so every pill came out as 'Received
[received]', 'In Progress [in_progress]', etc.

Removed the compute. Admin list view already shows code as a
separate column.

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': '19.0.8.18.1',
+    'version': '19.0.8.18.2',
     'category': 'Manufacturing/Plating',
     'summary': 'Native plating job model — replaces mrp.production / mrp.workorder bridge.',
     'author': 'Nexa Systems Inc.',