feat: unify pickup selection

tests/Validator/Constraints/ParticipantValidatorTest.php

@@ -112,12 +112,12 @@ class ParticipantValidatorTest extends ConstraintValidatorTestCase
         $busService = new Service();
         $busService->subType = 'BUS';
         $participant->transportationOutbound = $busService;
-        $participant->pickupOutbound = null;
+        $participant->pickup = null;
 
         $this->validator->validate($participant, new Participant());
 
         $this->buildViolation('Bitte auswählen')
-            ->atPath('property.path.pickupOutbound')
+            ->atPath('property.path.pickup')
             ->assertRaised();
     }
 
@@ -128,7 +128,7 @@ class ParticipantValidatorTest extends ConstraintValidatorTestCase
         $trainService = new Service();
         $trainService->subType = 'TRAIN';
         $participant->transportationOutbound = $trainService;
-        $participant->pickupOutbound = null; // Not required for non-bus
+        $participant->pickup = null; // Not required for non-bus
 
         $this->validator->validate($participant, new Participant());