Implements right "see confidential course" on method findByPerson

Add unit tests for that

src/Bundle/ChillMainBundle/Security/Authorization/AuthorizationHelperInterface.php

@@ -26,7 +26,8 @@ interface AuthorizationHelperInterface
     public function getReachableCenters(UserInterface $user, string $role, ?Scope $scope = null): array;
 
     /**
-     * @param Center|list<Center> $center
+     * @param Center|array<Center> $center
+     * @return list<Scope>
      */
     public function getReachableScopes(UserInterface $user, string $role, Center|array $center): array;
 }