Purchase order line price unit digits

This module changes how the unit price is displayed and stored on purchase order lines. It applies the "Product Price" decimal precision to the price_unit field of purchase.order.line, which is the field holding the price per unit of each product ordered from a vendor.

In practice, when you create or edit a purchase order (Purchases > Orders > Purchase Orders) and add a line, the unit price is now formatted with the number of decimals configured for product prices, rather than the general decimal precision used by default. This keeps the price shown on the order line consistent with the price you see on the product and in other price-related screens.

• The change is purely about number formatting and rounding of the unit price.
• It does not add menus, buttons, reports, emails or scheduled actions.
• It does not change taxes, totals, quantities or any other field.
• It only affects the purchase.order.line model and its price_unit field.

Because the field definition is inherited, the behaviour applies everywhere the unit price appears on purchase order lines, including the order form and any list or report that reads that field. No other Odoo area is modified.