fix: ensure unique services mapping when creating api payload

src/Service/BookingFingerprintService.php

@@ -126,6 +126,7 @@ class BookingFingerprintService
     private function normalizeServiceArray(array $services): array
     {
         $ids = array_map(fn ($s) => $s->id, $services);
+        $ids = array_unique($ids);
         sort($ids);
 
         return array_values($ids);