wip: reconcile assigned family insurance rate on updated participant

src/Form/Model/BookingDto.php

@@ -70,6 +70,21 @@ class BookingDto
      */
     public ?string $originalFingerprint = null;
 
+    /**
+     * Whether the applicant has already been notified that family insurance became
+     * available after they picked a non-family insurance while dependents were incomplete.
+     * Prevents re-showing the same hint on every subsequent participant card submission.
+     */
+    public bool $familyInsuranceHintShown = false;
+
+    /**
+     * Whether the applicant's current insurance choice was made while family insurance
+     * was not yet eligible (i.e. before all dependents' dates of birth were known).
+     * Set at selection time; used to distinguish "family insurance just became
+     * available" from "it was available all along and the applicant chose otherwise".
+     */
+    public bool $applicantInsuranceChosenWhileFamilyIneligible = false;
+
     public function __construct(public Travel $travel, public int $hotelId)
     {
     }