Sale invoice Policy

This module adds an invoicing policy choice directly on the sale order, so the whole order can be invoiced consistently rather than line by line according to each product.

On a sale order form, a new field appears right after the payment terms. It offers three choices: - Products Invoice Policy: standard behaviour, each product's own configuration decides. - Ordered quantities: the order invoices what the customer ordered. - Delivered quantities: the order invoices what was actually delivered.

The field is filled automatically from a company-level default when the order is created, and users can still change it on the order.

In Settings, under the sales invoicing options, a new setting lets you pick the default invoicing policy applied to new sale orders. This is separate from the invoicing policy configured on individual products.

Behind the scenes, the quantities and amounts to invoice on each order line are recalculated according to the chosen order policy, and the standard product-level logic is kept for lines that follow the product policy. Service and combo lines are left to the standard behaviour.

The module touches sale.order, sale.order.line, res.company and the sales settings screen.