wip: refactor to cards with individual participant forms

src/Form/Service/Trait/FormTraversalTrait.php

@@ -13,6 +13,9 @@ use Symfony\Component\Form\FormInterface;
  * This trait contains common form navigation logic used across different
  * form services and types. It centralizes the logic for finding root forms
  * and extracting booking DTOs from form hierarchies.
+ *
+ * Note: Card-based flows pass BookingDto via form options instead of
+ * relying on form tree traversal.
  */
 trait FormTraversalTrait
 {
@@ -20,8 +23,8 @@ trait FormTraversalTrait
      * Gets the BookingDto from the root of the form tree.
      *
      * This helper method traverses up the form tree to find the root form
-     * and extracts the BookingDto data. This is shared logic used
-     * by both create and edit participant forms.
+     * and extracts the BookingDto data. This is used as a fallback when
+     * BookingDto is not passed explicitly via form options.
      *
      * @param FormInterface $form The form to start traversing from
      *