feat: API endpoint to load travel data by code

src/BusProNet/Model/CrmSelection.php

@@ -2,10 +2,19 @@
 
 namespace App\BusProNet\Model;
 
+use Symfony\Component\Serializer\Attribute\Groups;
+
 class CrmSelection
 {
+    #[Groups(['api:single'])]
     public ?int $id = null;
+
+    #[Groups(['api:single'])]
     public ?string $label = null;
+
+    #[Groups(['api:single'])]
     public bool $mutable = false;
+
+    #[Groups(['api:single'])]
     public bool $selected = false;
 }