fix: filter selectable services by participant's age

src/BusProNet/Model/Service.php

@@ -79,4 +79,10 @@ class Service
 
     #[Groups(['api:single', 'api:list'])]
     public ?string $direction = null;
+
+    #[Groups(['api:single', 'api:list'])]
+    public ?int $ageFrom = null;
+
+    #[Groups(['api:single', 'api:list'])]
+    public ?int $ageTo = null;
 }

src/BusProNet/XmlLoader/TravelLoader.php

@@ -203,6 +203,8 @@ class TravelLoader extends AbstractLoader
             $service->price = $this
                 ->stringToFloat($this->getStringOrNullValue($serviceNode->filterXPath('//preis')));
             $service->status = $this->getStringOrNullValue($serviceNode->filterXPath('//status'));
+            $service->ageFrom = $this->getIntOrNullValue($serviceNode->filterXPath('//altervon'));
+            $service->ageTo = $this->getIntOrNullValue($serviceNode->filterXPath('//alterbis'));
 
             $additionalServices[$serviceId] = $service;
         });

src/BusProNet/XmlParser/ServicesParser.php

@@ -34,6 +34,9 @@ class ServicesParser extends AbstractParser
                 $service->direction = $node->attr('richtung');
             }
 
+            $service->ageFrom = $this->getIntOrNullValue($node->filterXPath('//altervon'));
+            $service->ageTo = $this->getIntOrNullValue($node->filterXPath('//alterbis'));
+
             $services[$service->id] = $service;
         });