Customer invoices (out_invoice / out_refund) can only be created via
sale.order._create_invoices() or with an invoice_origin matching an
existing SO. Applies to ALL users including admins. Once created,
the move's name is derived from the SO's parent number: IN-30000,
IN-30000-02, CN-30000, ... Pre-existing portal-job link on
action_post() preserved.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
765a0a4c82
