feat(overtime-contingent) : findByEmployeesAndYears + repo non-final pour les tests

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/Repository/EmployeeRttPaymentRepository.php

@@ -12,7 +12,7 @@ use Doctrine\Persistence\ManagerRegistry;
 /**
  * @extends ServiceEntityRepository<EmployeeRttPayment>
  */
-final class EmployeeRttPaymentRepository extends ServiceEntityRepository
+class EmployeeRttPaymentRepository extends ServiceEntityRepository
 {
     public function __construct(ManagerRegistry $registry)
     {
@@ -60,4 +60,31 @@ final class EmployeeRttPaymentRepository extends ServiceEntityRepository
             ->getResult()
         ;
     }
+
+    /**
+     * Paiements de plusieurs employés sur plusieurs exercices (fetch groupé,
+     * évite le N+1 sur l'export PDF). Jointure employé chargée.
+     *
+     * @param list<Employee> $employees
+     * @param list<int>      $years     années d'exercice
+     *
+     * @return EmployeeRttPayment[]
+     */
+    public function findByEmployeesAndYears(array $employees, array $years): array
+    {
+        if ([] === $employees || [] === $years) {
+            return [];
+        }
+
+        return $this->createQueryBuilder('p')
+            ->andWhere('p.employee IN (:employees)')
+            ->andWhere('p.year IN (:years)')
+            ->setParameter('employees', $employees)
+            ->setParameter('years', $years)
+            ->innerJoin('p.employee', 'e')
+            ->addSelect('e')
+            ->getQuery()
+            ->getResult()
+        ;
+    }
 }