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>