Rescue RecordNotFound in BlogPostsController#show (#8348)

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: iHiD

app/controllers/blog_posts_controller.rb

@@ -16,5 +16,7 @@ def index
   def show
     @post = BlogPost.published.find(params[:id])
     @other_posts = BlogPost.published.ordered_by_recency.includes(:author).where.not(id: @post.id).limit(6)
+  rescue ActiveRecord::RecordNotFound
+    render_404
   end
 end