feat: unique email addresses of participants unless child, cleanup

addresses #869axbn21

src/Form/Service/ParticipantSkiPassFieldHandler.php

@@ -79,9 +79,9 @@ class ParticipantSkiPassFieldHandler extends AbstractParticipantFieldHandler
      * selection. If the skipass is no longer appropriate for the participant's
      * age or exceeds the travel date range, it is automatically cleared.
      *
-     * @param array<string, mixed> $submittedData The submitted participant form data
-     * @param BookingDto $bookingDto The booking DTO to update (create or edit)
-     * @param int $participantIndex The index of the participant being processed
+     * @param array<string, mixed> $submittedData    The submitted participant form data
+     * @param BookingDto           $bookingDto       The booking DTO to update (create or edit)
+     * @param int                  $participantIndex The index of the participant being processed
      */
     public function processField(array $submittedData, BookingDto $bookingDto, int $participantIndex): void
     {
@@ -116,10 +116,10 @@ class ParticipantSkiPassFieldHandler extends AbstractParticipantFieldHandler
      * This method checks both age constraints (via birth year ranges) and
      * date constraints (skipass dates must be within travel dates).
      *
-     * @param mixed               $selectedService   The selected skipass to validate
-     * @param array               $availableServices Array of available skipasses
+     * @param mixed      $selectedService   The selected skipass to validate
+     * @param array      $availableServices Array of available skipasses
      * @param BookingDto $bookingDto        The booking DTO for context
-     * @param int                 $participantIndex  The participant index for age evaluation
+     * @param int        $participantIndex  The participant index for age evaluation
      *
      * @return bool True if the skipass is valid for the participant, false otherwise
      */