feat(configurator): C3 — link direct-order line to a prior quote

Adds quote_id (Many2one fp.quote.configurator) on the wizard line
with a domain scoped to the wizard's customer + quote states (sent /
accepted / won). Onchange auto-fills part, coating, and unit price
(final = estimator_override_price or calculated_price, per-part).

Mirrors x_fc_quote_id on sale.order.line for the audit trail. Surfaced
as a togglable column on the SO line tree and under "Qty & Price" on
the wizard line drill-in form.

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

fusion_plating/fusion_plating_configurator/views/sale_order_views.xml

@@ -103,6 +103,7 @@
                 <field name="x_fc_wo_group_tag" optional="hide"/>
                 <field name="x_fc_start_at_node_id" optional="hide"/>
                 <field name="x_fc_is_one_off" optional="hide"/>
+                <field name="x_fc_quote_id" optional="hide"/>
                 <field name="x_fc_rush_order" optional="hide"/>
             </xpath>
         </field>