feat: show room prices in room assignment form field

src/Validator/Constraints/RoomSelectionValidator.php

@@ -45,7 +45,7 @@ class RoomSelectionValidator extends ConstraintValidator
         $hasBabyRoom = false;
 
         foreach ($selectedRooms as $roomSelection) {
-            $room = $availableRooms[$roomSelection->roomId] ?? null;
+            $room = $availableRooms[$roomSelection->id] ?? null;
 
             if (null === $room) {
                 continue;