fix(bookstack) : add uriVariables to BookStackLink and BookStackSearchResult

API Platform 4 requires explicit uriVariables declaration for
URI template parameters on DTO resources.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/ApiResource/BookStackSearchResult.php

@@ -6,6 +6,8 @@ namespace App\ApiResource;
 
 use ApiPlatform\Metadata\ApiResource;
 use ApiPlatform\Metadata\GetCollection;
+use ApiPlatform\Metadata\Link;
+use App\Entity\Task;
 use App\State\BookStackSearchResultProvider;
 use Symfony\Component\Serializer\Attribute\Groups;
 
@@ -13,6 +15,9 @@ use Symfony\Component\Serializer\Attribute\Groups;
     operations: [
         new GetCollection(
             uriTemplate: '/tasks/{taskId}/bookstack/search',
+            uriVariables: [
+                'taskId' => new Link(fromClass: Task::class, identifiers: ['id']),
+            ],
             normalizationContext: ['groups' => ['bookstack_search:read']],
             provider: BookStackSearchResultProvider::class,
             security: "is_granted('IS_AUTHENTICATED_FULLY')",