fix: select description from users in article enrichArticle query

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

packages/backend/src/graphql/resolvers/articles.ts

@@ -13,6 +13,7 @@ async function enrichArticle(db: any, article: any) {
         artist_name: users.artist_name,
         slug: users.slug,
         avatar: users.avatar,
+        description: users.description,
       })
       .from(users)
       .where(eq(users.id, article.author))