Loyalty programs can now be used in website eCommerce, not just in point of sale. This makes promotions and rewards more consistent across sales channels and gives customers a unified loyalty experience online and in-store.

This PR adds the support for loyalty programs in website ecommerce.

Before this PR the loyalty program was tightly linked to POS.

After this PR the loyalty program is made independent from POS and is reuses in a new website_sale_loyalty module.


task-2319729
https://github.com/odoo/odoo/pull/63628/commits
https://github.com/odoo/upgrade/pull/2038

Loyalty program features are being separated from Point of Sale so they can also support eCommerce experiences. The change also protects customers from losing loyalty points incorrectly during refunds, helping keep balances accurate.

Extract loyalty base concept from pos_loyalty