wip: submit booking to api

src/BusProNet/Constants.php

@@ -51,4 +51,8 @@ final class Constants
     // Payment methods
     public const PAYMENT_METHOD_TRANSFER = 'transfer';
     public const PAYMENT_METHOD_DEBIT = 'debit';
+
+    // Payment type IDs for API
+    public const PAYMENT_TYPE_ID_TRANSFER = 2;
+    public const PAYMENT_TYPE_ID_DEBIT = 5;
 }