feat(promote-customer-spec): Phase D — reports + tablet payload include spec

Reports updated to print Specification (with revision via display_name):
- report_fp_sale.xml — header sections show "SPECIFICATION" instead
  of "COATING CONFIG", reads doc.x_fc_customer_spec_id (added on
  sale.order via quality inherit, computed from line.customer_spec_id)
- report_fp_wo_sticker.xml — propagates _spec alongside _coating
- fusion_plating_reports/report_fp_job_traveller.xml — header row
  now shows Specification (falls back to coating)
- fusion_plating_jobs/report_fp_job_traveller.xml — same fall-back
- fusion_plating_jobs/report_fp_job_sticker.xml — _spec added

sale.order.x_fc_customer_spec_id added as a stored compute on
sale.order (in quality) so reports can render order-level spec.
Mirrors the line's first spec; updates on line edit.

Tablet payload (shopfloor_controller.py):
- spec_label added to the job payload dict
- defensive 'customer_spec_id' in job._fields check (shopfloor doesn't
  depend on quality — circular if added)

Portal: deferred (same circular-dep issue, more substantial UI rewrite
needed; Phase E backlog item).

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': '19.0.5.2.0',
+    'version': '19.0.5.3.0',
     'category': 'Manufacturing/Plating',
     'summary': 'Native QMS for plating shops: NCR, CAPA, calibration, AVL, FAIR, '
                'internal audits, customer specs, document control. CE + EE compatible.',

fusion_plating/fusion_plating_quality/models/sale_order_line_inherit.py

@@ -6,6 +6,29 @@
 from odoo import api, fields, models
 
 
+class SaleOrder(models.Model):
+    """Add an order-level Specification mirror so reports can print it
+    in the header summary section. Computed from the lines (first
+    spec wins; falls back to blank when lines have no spec).
+    """
+    _inherit = 'sale.order'
+
+    x_fc_customer_spec_id = fields.Many2one(
+        'fusion.plating.customer.spec',
+        string='Specification',
+        compute='_compute_x_fc_customer_spec_id',
+        store=True,
+        help='First specification cited on this order (or blank). '
+             'Drives the order-level header in customer-facing PDFs.',
+    )
+
+    @api.depends('order_line.x_fc_customer_spec_id')
+    def _compute_x_fc_customer_spec_id(self):
+        for so in self:
+            specs = so.order_line.mapped('x_fc_customer_spec_id')
+            so.x_fc_customer_spec_id = specs[:1] if specs else False
+
+
 class SaleOrderLine(models.Model):
     """Add the Specification picker to the SO line.