feat(plating-sec): SO confirm gate + fix _administrator typo + Python sweep

Phase G of permissions overhaul.

G2: sale.order.action_confirm now requires group_fp_sales_manager
(spec Section 2.B). Sales Reps can save drafts but cannot move SOs
to 'sale' state. UserError raised with clear message if attempted.

G3: Fixed audit-finding-11 typo bug in 2 files. The original code
checked has_group('fusion_plating.group_fusion_plating_administrator'),
an xmlid that has NEVER existed - so the gate always returned False
and only the Manager-side check actually fired. Fixed both:
  - fusion_plating_invoicing/models/res_partner.py:34
  - fusion_plating_configurator/wizard/fp_direct_order_wizard.py:467
Both now check has_group('fusion_plating.group_fp_manager') which
transitively includes Owner via implied_ids.

G4: Swept all Python has_group() calls to reference new group xmlids.
Backward-compat keeps old refs working today (Phase A's implied_ids),
but the sweep ensures correctness after the 30-day rollback window
deletes old groups. Replacements:
  group_fusion_plating_operator    -> group_fp_technician
  group_fusion_plating_supervisor  -> group_fp_shop_manager_v2
  group_fusion_plating_manager     -> group_fp_manager
  group_fusion_plating_admin       -> group_fp_owner
  group_fusion_plating_cgp_officer -> group_fp_quality_manager
  group_fusion_plating_cgp_designated_official -> group_fp_owner
  group_fp_estimator               -> group_fp_sales_rep
  group_fp_accounting              -> group_fp_manager
  group_fp_receiving               -> group_fp_shop_manager_v2
  group_fp_shop_manager (legacy)   -> group_fp_manager

G1: test_sales_manager_gate.py covers the new confirm gate (SR
blocked, SMg allowed, Manager allowed via diamond implication).

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

fusion_plating/fusion_plating_jobs/controllers/job_scan.py

@@ -26,7 +26,7 @@ class FpJobScanController(http.Controller):
         # Otherwise (operator) → land on process tree client action
         # (will be wired once process tree is added).
         user = request.env.user
-        is_manager = user.has_group('fusion_plating.group_fusion_plating_manager')
+        is_manager = user.has_group('fusion_plating.group_fp_manager')
         if is_manager:
             return request.redirect(
                 '/odoo/action-fusion_plating.action_fp_job/%d' % job.id