[ICC-362] REAL_BLANK 타입 추가

[GulSauce]

📢 설명

변경 1: [제목]

[변경에 대한 설명]

의사 선택과정 (trade-off)

trade-off가 있는 경우에만 작성

얻은 것

잃은 것

코드 설명: 인라인 코멘트 확인

✅ 체크 리스트

재현 확인

• (PR 작성 시 채워주세요)

기본

• 의사 선택 과정이 적절한지 확인
• 코드 리뷰

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