feat: disable Re-run AI when pipeline job is already active

Add hasActiveJobForArticle() to check for queued/processing jobs.
The displayIf closure hides the action while a job is running.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/Domain/Pipeline/Repository/AIPipelineJobRepositoryInterface.php

@@ -17,6 +17,8 @@ interface AIPipelineJobRepositoryInterface
 
     public function findByArticleId(Uuid $articleId): ?AIPipelineJob;
 
+    public function hasActiveJobForArticle(Uuid $articleId): bool;
+
     /** @return list<AIPipelineJob> */
     public function findUpdatedSince(\DateTimeImmutable $since): array;
 

src/Infrastructure/Http/Controller/Admin/ArticleCrudController.php

@@ -77,11 +77,11 @@ final class ArticleCrudController extends AbstractCrudController
             ->linkToCrudAction('rerunAiPipeline')
             ->setCssClass('btn btn-sm btn-info')
             ->askConfirmation(new TranslatableMessage('action.rerun_ai_confirm', [], 'admin'))
-            ->displayIf(static fn (Article $a) => \in_array(
+            ->displayIf(fn (Article $a) => \in_array(
                 $a->getStatus(),
                 [ArticleStatus::Draft, ArticleStatus::Ingesting, ArticleStatus::NeedsReview],
                 true,
-            ));
+            ) && !$this->jobRepository->hasActiveJobForArticle($a->getId()));
 
         return $actions
             ->add(Crud::PAGE_INDEX, $activate)

src/Infrastructure/Persistence/Repository/DoctrineAIPipelineJobRepository.php

@@ -37,6 +37,20 @@ final class DoctrineAIPipelineJobRepository implements AIPipelineJobRepositoryIn
         );
     }
 
+    public function hasActiveJobForArticle(Uuid $articleId): bool
+    {
+        $count = (int) $this->em->createQuery(
+            'SELECT COUNT(j.id) FROM App\Domain\Pipeline\AIPipelineJob j
+             WHERE j.articleId = :articleId
+             AND j.status IN (:statuses)'
+        )
+            ->setParameter('articleId', $articleId)
+            ->setParameter('statuses', [AIPipelineJobStatus::Queued, AIPipelineJobStatus::Processing])
+            ->getSingleScalarResult();
+
+        return $count > 0;
+    }
+
     /** @return list<AIPipelineJob> */
     public function findUpdatedSince(\DateTimeImmutable $since): array
     {