feat(configurator): x_fc_* fields on sale.order + new sale.order.line extensions

Task A5. Adds customer_job_number, planned_start_date, and
internal_deadline on sale.order. Customer deadline maps to Odoo's
native commitment_date. Creates sale_order_line.py with per-line
plating fields: part_catalog_id, coating_config_id, treatment_ids
M2M, part_deadline, rush_order.

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

fusion_plating/fusion_plating_configurator/models/__init__.py

@@ -12,4 +12,6 @@ from . import fp_customer_price_list
 from . import fp_sale_description_template
 from . import fp_quote_configurator
 from . import sale_order
+from . import sale_order_line
 from . import res_partner
+from . import fp_process_node

fusion_plating/fusion_plating_configurator/models/sale_order.py

@@ -58,6 +58,19 @@ class SaleOrder(models.Model):
         string='Receiving Status', default='not_received', tracking=True,
     )
 
+    # ---- Direct Order rewrite (Phase A) ----
+    x_fc_customer_job_number = fields.Char(
+        string='Customer Job #',
+        help="Customer's internal job number for cross-referencing.",
+        tracking=True,
+    )
+    x_fc_planned_start_date = fields.Date(
+        string='Planned Start Date', tracking=True,
+    )
+    x_fc_internal_deadline = fields.Date(
+        string='Internal Deadline', tracking=True,
+    )
+
     @api.onchange('upload_rfq_file')
     def _onchange_upload_rfq_file(self):
         """Create attachment from uploaded binary and link it."""

fusion_plating/fusion_plating_configurator/models/sale_order_line.py

@@ -0,0 +1,22 @@
+# -*- coding: utf-8 -*-
+# Copyright 2026 Nexa Systems Inc.
+# License OPL-1 (Odoo Proprietary License v1.0)
+# Part of the Fusion Plating product family.
+
+from odoo import fields, models
+
+
+class SaleOrderLine(models.Model):
+    _inherit = 'sale.order.line'
+
+    x_fc_part_catalog_id = fields.Many2one(
+        'fp.part.catalog', string='Part',
+    )
+    x_fc_coating_config_id = fields.Many2one(
+        'fp.coating.config', string='Primary Treatment',
+    )
+    x_fc_treatment_ids = fields.Many2many(
+        'fp.treatment', string='Additional Treatments',
+    )
+    x_fc_part_deadline = fields.Date(string='Part Deadline')
+    x_fc_rush_order = fields.Boolean(string='Rush')