fix: properly handle parking service selection

src/BusProNet/DataProcessor/ParticipantServiceProcessor.php

@@ -115,7 +115,7 @@ class ParticipantServiceProcessor
      * Collects additional services from a participant for mapping.
      *
      * Extracts all additional services (courses, board, rentals, ski pass, rental insurance,
-     * additional services) from a participant into a flat array of Service objects.
+     * parking, additional services) from a participant into a flat array of Service objects.
      *
      * @param ParticipantDto $participant The participant data
      *
@@ -140,6 +140,11 @@ class ParticipantServiceProcessor
             $services[] = $participant->rentalInsurance;
         }
 
+        // Add parking service if selected (for self-organized PKW transportation)
+        if (true === $participant->parking && null !== $participant->parkingService) {
+            $services[] = $participant->parkingService;
+        }
+
         return $services;
     }