* Update composer.lock with dependency upgrades and improvements
Updated multiple dependencies in `composer.lock` to their latest versions, including upgrades for Doctrine, PHPUnit, Symfony components, and extended PostgreSQL support.
* Fix sass compile
This commit removes nullable Uuid properties for consistency, transitions the Correction entity to QuizCandidate with associated migrations, refactors queries and repositories, adjusts related routes and controllers to use the new entity, updates front-end assets for elimination workflows, and standardizes route requirements and naming conventions.
Marijn
