chore: fix phpstan errors

src/Form/Service/Condition/BulkInsuranceBookingCondition.php

@@ -79,6 +79,7 @@ class BulkInsuranceBookingCondition implements FieldConditionInterface
     /**
      * Gets the bulk insurance booking flag value from form data or participant DTO.
      */
+    /** @param array<string, mixed> $formData */
     private function getBulkInsuranceBookingValue(array $formData, object $applicant): bool
     {
         // First check form data (for fresh submissions)