wip: booking process

src/BusProNet/Model/Surcharge.php

@@ -1,7 +1,15 @@
 <?php
 
+declare(strict_types=1);
+
 namespace App\BusProNet\Model;
 
+/**
+ * Represents a surcharge with pricing and participant mapping.
+ *
+ * This class handles surcharge data including label, pricing structure,
+ * and participant mapping for booking calculations.
+ */
 class Surcharge
 {
     public ?string $label = null;