feat: move scope of enforced 'option' status to full booking

addresses #869chtfeq

src/Form/Model/BookingDto.php

@@ -54,7 +54,7 @@ class BookingDto
 
     /**
      * Booking status code for API submission.
-     * Values: 'F' (Final/Frei), 'A' (Anfrage/Inquiry).
+     * Values: 'F' (Fest), 'O' (Option), 'A' (Anfrage/Inquiry).
      */
     public string $bookingStatus = 'F';