feat(blog): enhance blog identifier resolution to support multiple identifiers and improve URL handling

src/Blog/Controller/BlogController.php

@@ -193,7 +193,10 @@ class BlogController extends BaseController
     #[Route('/api/v1/blog/{slug}', methods: ['GET'])]
     public function detail(string $slug, Request $request): JsonResponse
     {
-        $blog = $this->blogRepo->findBySlug($slug) ?? $this->blogRepo->findByUuid($slug);
+        // Any identifier the post has ever been addressed by: slug, uuid, topic_slug,
+        // or the uuid prefix carried in an outdated slug. The response always reports
+        // the canonical slug, so the site can redirect an outdated URL instead of 404.
+        $blog = $this->blogRepo->findByPublicIdentifier($slug);
         if ($blog === null || $blog->getStatus() !== Blog::STATUS_PUBLISHED) {
             return $this->error(ErrorCodes::ERR_NOT_FOUND_001, 'مقاله یافت نشد', 404);
         }