This fix corrects cases where searches could miss valid records when related data was involved. It improves reliability for users working across accounting, contacts, calendar, sales, and inventory records by ensuring search filters return the expected results.

This is a cherry-pick in master of #25182

A leftover debug message was removed from a purchasing and inventory test. This keeps automated test results cleaner and easier for teams to review, with no change to business functionality.

Remove forgotten debug print in test

This update prevents startup and routing failures caused by changes in a newer version of Werkzeug, a web component Odoo depends on. It also improves warning visibility so similar compatibility issues are easier to catch before they affect deployments.

Some more leftover deprecation warnings I missed in odoo/odoo#44164, which turned into errors when Werkzeug 1.0 was released, as well as a few other issues.