fix: don't update booking session and draft on form refresh

Each form refresh would create a draft even for users that just explore
booking options causing stale draft records in the database.

src/Controller/Booking/Edit/IndexController.php

@@ -287,10 +287,6 @@ class IndexController extends AbstractController
         // Collect notifications from field handlers
         $notifications = $this->collectAndClearNotifications($bookingDto);
 
-        // Save updated booking data to session and draft
-        $this->bookingService->saveBookingDto($request, $bookingDto, BookingDto::MODE_EDIT);
-        $this->draftService->saveDraft($user, $id, $bookingDto);
-
         // Get complete summary data (pricing, rooms, CMS data)
         $summaryData = $this->summaryDataService->getSummaryData($bookingDto);