Brazilian Localization Sale Invoice Plan

This module connects the sale invoice plan feature with the Brazilian localization. When a sale order uses an invoice plan (several invoices spread over time), Odoo creates the invoices step by step. With this module, every time an invoice is generated from the plan, the Brazilian fiscal quantity field on each invoice line is automatically set to the same value as the invoiced quantity.

• The change happens on the sale.invoice.plan model, which is the object that stores the invoicing schedule of a sale order.
• It only affects invoices that come from an invoice plan; it does not change manual invoices.
• The fiscal quantity is used by the Brazilian fiscal documents (NF-e, NFS-e and similar) and tax calculations, so keeping it aligned with the invoiced quantity avoids mismatches between the commercial invoice and the fiscal document.
• No new menus, screens or buttons are added; the behaviour is automatic in the background.
• A demo sale order for services with a three-installment monthly plan is included to illustrate the feature.

Because the module depends on l10n_br_sale and sale_invoice_plan, it only makes sense in a Brazilian database where both the Brazilian localization and the invoice plan feature are installed.