The manufacturing, procurement, repair, and byproduct areas were modernized to use Odoo's newer internal framework. This should make these business processes easier to maintain and evolve, with limited immediate change for day-to-day users.

The Survey and Survey CRM apps were migrated to Odoo's newer internal framework and reorganized for cleaner maintenance. This should help future development and reliability while adding automated cleanup of unused empty survey responses.

task: https://www.odoo.com/web#id=11957&view_type=form&model=project.task&action=327&menu_id=4720
pad: https://pad.odoo.com/p/r.04895e80ed14563b56ab6cd2176276f0

The Calendar app’s underlying code has been reorganized and migrated to Odoo’s newer framework style, making it easier to maintain and evolve. Existing calendar behavior is intended to remain the same, with tests converted to the newer format and a small field-definition issue fixed.

superseding #11303