refactor: update article deletion and retrieval methods to use external ID

tests/lib/feature/article/article.service.test.ts

@@ -1,13 +1,13 @@
-import { getArticlesPaginated } from '@/lib/feature/article/article.external';
 import {
     CreateArticleModel,
     UpdateArticleModel,
 } from '@/lib/feature/article/article.model';
 import {
-    deleteArticle,
+    deleteArticleByExternalId,
     getArticleByExternalId,
     getArticleBySlug,
     getArticlesByAuthorId,
+    getArticlesPaginated,
     saveArticle,
     updateArticle,
 } from '@/lib/feature/article/article.service';
@@ -259,7 +259,9 @@ describe('ArticleService', () => {
         if (!saveResult.ok) return;
         expect(saveResult.value.id).toBeDefined();
 
-        const deleteResult = await deleteArticle(saveResult.value.id);
+        const deleteResult = await deleteArticleByExternalId(
+            saveResult.value.externalId
+        );
         expect(deleteResult.ok).toBe(true);
 
         const getResult = await getArticleBySlug('article-to-delete');
@@ -269,7 +271,7 @@ describe('ArticleService', () => {
     });
 
     test('cannot delete non-existing article', async () => {
-        const result = await deleteArticle('9999');
+        const result = await deleteArticleByExternalId('9999');
 
         expect(result.ok).toBe(false);
         if (result.ok) return;