The budget management module was migrated to Odoo's newer internal framework and its files were reorganized. This should make the feature easier to maintain and test without changing the core budgeting workflow for users.

Task: https://www.odoo.com/web#id=12160&view_type=form&model=project.task&action=327&menu_id=4720

The product-related code was migrated to a newer internal framework, improving maintainability and consistency across pricing, delivery, accounting, and stock workflows. Existing pricing tests were also converted to a more reliable automated test format, helping protect business-critical product pricing behavior over time.