feat: simplify validation

src/Form/Model/ParticipantDto.php

@@ -8,7 +8,7 @@ use App\BusProNet\Model\Service;
 use App\Validator\Constraints as AppAssert;
 use Symfony\Component\Validator\Constraints as Assert;
 
-#[AppAssert\Participant(groups: ['booking_edit'])]
+#[AppAssert\Participant(groups: ['booking_edit', 'booking_create_step_2'])]
 class ParticipantDto
 {
     public ?int $index = null;
@@ -33,7 +33,6 @@ class ParticipantDto
     #[Assert\NotNull(message: 'Bitte angeben', groups: ['booking_edit', 'booking_create_step_2'])]
     public ?\DateTimeImmutable $dateOfBirth = null;
 
-    #[Assert\NotBlank(message: 'Bitte angeben', groups: ['booking_edit', 'booking_create_step_2'])]
     #[Assert\Email(message: 'Bitte eine gültige E-Mail Adresse angeben', mode: 'strict', groups: ['booking_edit', 'booking_create_step_2'])]
     public ?string $email = null;