feat(configurator): A3 - add Express x_fc_* flags to sale.order.line

fusion_plating/fusion_plating_configurator/models/sale_order_line.py

@@ -312,6 +312,27 @@ class SaleOrderLine(models.Model):
              'pair, falling back to the part\'s default range. Prints '
              'verbatim on the cert, packing slip, and invoice.',
     )
+
+    # ---- Express Orders per-line flags (2026-05-26) ----
+    # Mirror fp.direct.order.line.{customer_line_ref, masking_enabled, bake_instructions}
+    # and persist past wizard confirm so _fp_apply_express_overrides_to_job can read them.
+    x_fc_customer_line_ref = fields.Char(
+        string='Customer Line Job #',
+        help='Per-line customer sub-reference (e.g. ABC, DEF). '
+             'Prints on customer docs (quote, SO, invoice, packing slip).',
+    )
+    x_fc_masking_enabled = fields.Boolean(
+        string='Masking Enabled',
+        default=True,
+        help='When False, the job-creation hook spawns fp.job.node.override '
+             '(included=False) for every masking + de_masking node on the recipe.',
+    )
+    x_fc_bake_instructions = fields.Text(
+        string='Bake Instructions',
+        help='Empty = bake steps are opted out of the job. Non-empty = bake '
+             'steps run, with this text shown on the operator tablet under '
+             'fp.job.step.instructions.',
+    )
     x_fc_revision_snapshot = fields.Char(
         string='Revision (snapshot)',
         copy=False,