feat: extensible participant status determination for booking creation

Adds a rule-based system to determine participant status in CREATE
payloads. Participants selecting a 'Begleitperson' service now receive
status 'O' (Option), all others default to 'F' (Final).

- Add ParticipantStatusRuleInterface for defining status rules
- Add ParticipantStatusRuleRegistry for priority-based rule evaluation
- Add ChaperonServiceStatusRule for Begleitperson detection
- Integrate status evaluation into BookingPayloadBuilder

src/BusProNet/DataProcessor/BookingPayloadBuilder.php

@@ -6,6 +6,7 @@ namespace App\BusProNet\DataProcessor;
 
 use App\BusProNet\Constants;
 use App\BusProNet\Model\Booking;
+use App\BusProNet\Service\ParticipantStatusRuleRegistry;
 use App\Form\Model\BookingDto;
 
 /**
@@ -18,6 +19,7 @@ class BookingPayloadBuilder
 {
     public function __construct(
         private readonly ServiceMappingCollector $mappingCollector,
+        private readonly ParticipantStatusRuleRegistry $statusRuleRegistry,
     ) {
     }
 
@@ -275,6 +277,7 @@ class BookingPayloadBuilder
         foreach ($bookingDto->participants as $index => $participant) {
             $participantData = [
                 '@id' => $index + 1,
+                'status' => $this->statusRuleRegistry->evaluateStatus($participant),
                 'name' => $participant->lastName,
                 'vorname' => $participant->firstName,
                 'geschlecht' => $participant->gender ?? '',