feat: refactor staffing status assignment and filtering

src/Controller/Admin/Application/DeleteController.php

@@ -26,6 +26,9 @@ class DeleteController extends AbstractController
         $this->entityManager->remove($application);
         $this->entityManager->flush();
 
+        $application->getAssignment()->updateStaffingStatus();
+        $this->entityManager->flush();
+
         $this->addFlash('success', 'Die Bewerbung wurde gelöscht');
         $this->logger->info('Delete application', [
             'destination' => (string) $application->getAssignment()->getDestination(),