Add TransitionHasDestineeIfIsSentExternal validator

This commit introduces a new validator to ensure that transitions marked as 'sent' have a designated external recipient. It includes related tests for scenarios with and without recipients and covers integration with the workflow context.

src/Bundle/ChillMainBundle/Workflow/WorkflowTransitionContextDTO.php

@@ -14,6 +14,7 @@ namespace Chill\MainBundle\Workflow;
 use Chill\MainBundle\Entity\User;
 use Chill\MainBundle\Entity\UserGroup;
 use Chill\MainBundle\Entity\Workflow\EntityWorkflow;
+use Chill\MainBundle\Workflow\Validator\TransitionHasDestineeIfIsSentExternal;
 use Chill\PersonBundle\Entity\Person;
 use Chill\ThirdPartyBundle\Entity\ThirdParty;
 use Chill\ThirdPartyBundle\Validator\ThirdPartyHasEmail;
@@ -24,6 +25,7 @@ use Symfony\Component\Workflow\Transition;
 /**
  * Context for a transition on an workflow entity.
  */
+#[TransitionHasDestineeIfIsSentExternal]
 class WorkflowTransitionContextDTO
 {
     /**