fix: correctly validate pickup selection

closes #869c94jqn

src/Validator/Constraints/ParticipantValidator.php

@@ -28,14 +28,12 @@ class ParticipantValidator extends ConstraintValidator
 
     public function assertPickupSelected(ParticipantDto $participant): void
     {
-        // Check if either outbound or inbound transportation is bus
+        // Pickup applies only to outbound bus journey
         $hasOutboundBus = null !== $participant->transportationOutbound
             && 'BUS' === $participant->transportationOutbound->subType;
-        $hasInboundBus = null !== $participant->transportationInbound
-            && 'BUS' === $participant->transportationInbound->subType;
 
-        // Require pickup if at least one direction has bus transport
-        if (($hasOutboundBus || $hasInboundBus) && null === $participant->pickup) {
+        // Require pickup only when outbound transportation is bus
+        if (true === $hasOutboundBus && null === $participant->pickup) {
             $this->context->buildViolation('Bitte auswählen')
                 ->atPath('pickup')
                 ->addViolation()