Refactor entities and codebase for native property usage

- Replaced getters/setters with direct property access across entities and repositories.
- Added and configured `martin-georgiev/postgresql-for-doctrine` for PostgreSQL enhancements.
- Updated Doctrine configuration with types, mappings, and JSONB query functions.
- Removed unused `EliminationService` and related YAML configurations.

src/Repository/QuestionRepository.php

@@ -35,7 +35,7 @@ class QuestionRepository extends ServiceEntityRepository
             DQL)
             ->setMaxResults(1)
             ->setParameter('candidate', $candidate)
-            ->setParameter('quiz', $candidate->getSeason()->getActiveQuiz())
+            ->setParameter('quiz', $candidate->season->activeQuiz)
             ->getOneOrNullResult();
     }
 }