fix(plating): clean up CoC layout — drop empty logo column + separating lines

- Customer block: remove the (usually empty) customer-logo third column;
  Address | Contact now split 50/50.
- Remove the heavy header bottom border (the Sale Order header has none) and
  the hr.heavy rule between the customer block and the cert info table.
- Drop now-dead CSS (.fp-coc h1, hr.heavy, .customer-logo). Bump reports to
  19.0.11.28.0.

Deployed + render-verified on entech (CoC-30065, 222KB PDF, no QWeb errors).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

fusion_plating/fusion_plating_reports/__manifest__.py

@@ -3,7 +3,7 @@
 # License OPL-1 (Odoo Proprietary License v1.0)
 {
     'name': 'Fusion Plating — Reports',
-    'version': '19.0.11.27.0',
+    'version': '19.0.11.28.0',
     'category': 'Manufacturing/Plating',
     'summary': 'PDF reports for Fusion Plating: quote, SO, WO, packing, BoL, CoC, invoice, receipt, quality + compliance.',
     'depends': [