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

tests/BusProNet/DataProcessor/BookingDataProcessorTest.php

@@ -18,6 +18,7 @@ use App\BusProNet\Model\Pickup;
 use App\BusProNet\Model\Room;
 use App\BusProNet\Model\Service;
 use App\BusProNet\Model\Travel;
+use App\BusProNet\Service\ParticipantStatusRuleRegistry;
 use App\Form\Model\BookingDto;
 use App\Form\Model\ParticipantDto;
 use App\Service\BookingPriceCalculatorService;
@@ -52,7 +53,8 @@ class BookingDataProcessorTest extends TestCase
         // Create the new dependencies
         $mappingCollector = new ServiceMappingCollector();
         $serviceProcessor = new ParticipantServiceProcessor(new NullLogger());
-        $payloadBuilder = new BookingPayloadBuilder($mappingCollector);
+        $statusRuleRegistry = new ParticipantStatusRuleRegistry([]);
+        $payloadBuilder = new BookingPayloadBuilder($mappingCollector, $statusRuleRegistry);
         $personalDataSynchronizer = new PersonalDataSynchronizer();
 
         $this->processor = new BookingDataProcessor(