DX: improve performance for counting feature linked to person

src/Bundle/ChillPersonBundle/Repository/ResidentialAddressRepository.php

@@ -32,6 +32,16 @@ class ResidentialAddressRepository extends ServiceEntityRepository
         parent::__construct($registry, ResidentialAddress::class);
     }
 
+    public function countByPerson(Person $person): int
+    {
+        return $this->createQueryBuilder('ra')
+            ->select('COUNT(ra)')
+            ->where('ra.person = :person')
+            ->setParameter('person', $person)
+            ->getQuery()
+            ->getSingleScalarResult();
+    }
+
     public function buildQueryFindCurrentResidentialAddresses(Person $person, ?DateTimeImmutable $at = null): QueryBuilder
     {
         $date = null === $at ? new DateTimeImmutable('today') : $at;