Refactor code to directly use Doctrine's ManagerRegistry

Replaced most of the invocations of getDoctrine()->getManager() with ManagerRegistry->getManager(), and added ManagerRegistry injection to controllers where needed. This is part of an ongoing effort to improve code clarity, and avoid unnecessary method chaining in various parts of the codebase.

src/Bundle/ChillPersonBundle/Controller/HouseholdApiController.php

@@ -31,7 +31,7 @@ use Symfony\Contracts\EventDispatcher\EventDispatcherInterface;
 
 class HouseholdApiController extends ApiController
 {
-    public function __construct(private readonly EventDispatcherInterface $eventDispatcher, private readonly HouseholdRepository $householdRepository, private readonly HouseholdACLAwareRepositoryInterface $householdACLAwareRepository) {}
+    public function __construct(private readonly EventDispatcherInterface $eventDispatcher, private readonly HouseholdRepository $householdRepository, private readonly HouseholdACLAwareRepositoryInterface $householdACLAwareRepository, private readonly \Doctrine\Persistence\ManagerRegistry $managerRegistry) {}
 
     /**
      * @Route("/api/1.0/person/household/by-address-reference/{id}.json",
@@ -93,7 +93,7 @@ class HouseholdApiController extends ApiController
             return $this->json($errors, 422);
         }
 
-        $this->getDoctrine()->getManager()->flush();
+        $this->managerRegistry->getManager()->flush();
 
         return $this->json(
             $address,