wip: email uniqueness validation

src/Form/Model/BookingDto.php

@@ -196,43 +196,4 @@ class BookingDto
         }
     }
 
-    #[Assert\Callback(groups: ['booking_create', 'booking_edit'])]
-    public function validateEmailUniqueness(ExecutionContextInterface $context): void
-    {
-        // Build map of email addresses to participant indices (adults only)
-        $emailMap = [];
-
-        foreach ($this->participants as $index => $participant) {
-            // Skip children (they can share email addresses)
-            if (true === $participant->isChild()) {
-                continue;
-            }
-
-            // Skip null or empty emails (handled by other validators)
-            if (null === $participant->email || '' === trim($participant->email)) {
-                continue;
-            }
-
-            // Normalize email for case-insensitive comparison
-            $normalizedEmail = strtolower(trim($participant->email));
-
-            // Add participant index to the email map
-            if (false === isset($emailMap[$normalizedEmail])) {
-                $emailMap[$normalizedEmail] = [];
-            }
-            $emailMap[$normalizedEmail][] = $index;
-        }
-
-        // Add validation errors for duplicate emails
-        foreach ($emailMap as $email => $indices) {
-            // Only add violations if email is used by multiple adult participants
-            if (1 < count($indices)) {
-                foreach ($indices as $index) {
-                    $context->buildViolation('Diese E-Mail Adresse wird bereits von einem anderen erwachsenen Teilnehmer verwendet')
-                        ->atPath(sprintf('participants[%d].email', $index))
-                        ->addViolation();
-                }
-            }
-        }
-    }
 }