fix(db): make remaining blog migrations idempotent

db/migrations/V025__AddNineBlogPostsProper.sql

@@ -194,7 +194,7 @@ $$,
   '프리랜서,경비,소득세,절세,디자이너,유튜버,강사',
   NOW(),
   NOW()
-);
+) ON CONFLICT (slug) DO NOTHING;
 
 -- 2. 월세 신고하는 방법
 INSERT INTO blog_posts (title, slug, content, category_id, is_published, seo_title, seo_description, tags, created_at, updated_at)
@@ -358,7 +358,7 @@ $$,
   '월세,임대소득,부동산세,신고,절세,집주인',
   NOW(),
   NOW()
-);
+) ON CONFLICT (slug) DO NOTHING;
 
 -- 3. 자녀 증여세 계산하기
 INSERT INTO blog_posts (title, slug, content, category_id, is_published, seo_title, seo_description, tags, created_at, updated_at)
@@ -528,7 +528,7 @@ $$,
   '증여세,자녀,상속세,절세,기초공제,특별공제',
   NOW(),
   NOW()
-);
+) ON CONFLICT (slug) DO NOTHING;
 
 -- 4. 사업자 등록 타이밍
 INSERT INTO blog_posts (title, slug, content, category_id, is_published, seo_title, seo_description, tags, created_at, updated_at)
@@ -715,7 +715,7 @@ $$,
   '사업자등록,부가가치세,창업,타이밍,간이과세',
   NOW(),
   NOW()
-);
+) ON CONFLICT (slug) DO NOTHING;
 
 -- 5. 소상공인 간단 기장
 INSERT INTO blog_posts (title, slug, content, category_id, is_published, seo_title, seo_description, tags, created_at, updated_at)
@@ -938,7 +938,7 @@ $$,
   '기장,소상공인,카페,편의점,부가가치세,소득세',
   NOW(),
   NOW()
-);
+) ON CONFLICT (slug) DO NOTHING;
 
 -- 6. 스마트스토어 판매자 세무
 INSERT INTO blog_posts (title, slug, content, category_id, is_published, seo_title, seo_description, tags, created_at, updated_at)
@@ -1136,7 +1136,7 @@ $$,
   '스마트스토어,쿠팡,네이버,판매자,부가가치세,소득세',
   NOW(),
   NOW()
-);
+) ON CONFLICT (slug) DO NOTHING;
 
 -- 7. 부가가치세 신고 기한
 INSERT INTO blog_posts (title, slug, content, category_id, is_published, seo_title, seo_description, tags, created_at, updated_at)
@@ -1316,7 +1316,7 @@ $$,
   '부가가치세,신고,기한,25일,가산세,납부',
   NOW(),
   NOW()
-);
+) ON CONFLICT (slug) DO NOTHING;
 
 -- 8. 종합소득세 신고 완벽 가이드
 INSERT INTO blog_posts (title, slug, content, category_id, is_published, seo_title, seo_description, tags, created_at, updated_at)
@@ -1503,7 +1503,7 @@ $$,
   '종합소득세,신고,기한,5월,프리랜서,사업자',
   NOW(),
   NOW()
-);
+) ON CONFLICT (slug) DO NOTHING;
 
 -- 9. 연말정산 환급 최대화
 INSERT INTO blog_posts (title, slug, content, category_id, is_published, seo_title, seo_description, tags, created_at, updated_at)
@@ -1707,4 +1707,5 @@ $$,
   '연말정산,환급,공제,절세,회사원,기본공제',
   NOW(),
   NOW()
-);
+) ON CONFLICT (slug) DO NOTHING;
+