feat: pre-flight check of agency bookings

addresses #869bqxr4q

src/Service/BookingEditDraftMerger.php

@@ -69,6 +69,8 @@ class BookingEditDraftMerger
         if (isset($data['services']) && true === is_array($data['services'])) {
             $this->applyServiceSelections($participant, $data['services'], $travel);
         }
+
+        $participant->normalizeLoadedData();
     }
 
     private function canApplyPersonalDataDraft(BookingDto $bookingDto, int $participantIndex, ParticipantDto $participant): bool