feat: increase availability cache ttl and ensure fresh data when entering form

src/Controller/Booking/Create/Step2Controller.php

@@ -132,8 +132,9 @@ class Step2Controller extends AbstractController
             throw $this->createNotFoundException(sprintf('Participant at index %d does not exist', $index));
         }
 
-        // Enrich with fresh availability data
-        $this->travelDataService->enrichWithFreshAvailabilities($bookingDto->travel);
+        // Fetch fresh availabilities when entering participant form
+        // This ensures up-to-date data and populates cache for subsequent HTMX refreshes
+        $this->travelDataService->enrichWithFreshAvailabilities($bookingDto->travel, cached: false);
 
         // Create form with booking_context option
         $form = $this->createParticipantForm($bookingDto, $index);