refactor: 빌더 사용 수정

- MemberSurveys 빌더 사용 제거 및 생성자 이용하도록 수정 (빌더 어노테이션은 유지)
- MemberSurvey는 빌더 사용하도록 수정

src/main/java/com/atwoz/survey/domain/membersurvey/MemberSurvey.java

@@ -33,13 +33,11 @@ public class MemberSurvey {
     @Column(nullable = false)
     private Integer answerNumber;
 
-    private MemberSurvey(final Long surveyId, final Long questionId, final Integer answerNumber) {
-        this.surveyId = surveyId;
-        this.questionId = questionId;
-        this.answerNumber = answerNumber;
-    }
-
     public static MemberSurvey of(final Long surveyId, final Long questionId, final Integer answerNumber) {
-        return new MemberSurvey(surveyId, questionId, answerNumber);
+        return MemberSurvey.builder()
+                .surveyId(surveyId)
+                .questionId(questionId)
+                .answerNumber(answerNumber)
+                .build();
     }
 }

src/main/java/com/atwoz/survey/domain/membersurvey/MemberSurveys.java

@@ -38,11 +38,13 @@ public class MemberSurveys {
     @OneToMany(cascade = {CascadeType.PERSIST, CascadeType.REMOVE}, orphanRemoval = true, fetch = FetchType.LAZY)
     private List<MemberSurvey> memberSurveys = new ArrayList<>();
 
+    private MemberSurveys(final Long memberId, final List<MemberSurvey> memberSurveys) {
+        this.memberId = memberId;
+        this.memberSurveys = memberSurveys;
+    }
+
     public static MemberSurveys createWithMemberId(final Long memberId) {
-        return MemberSurveys.builder()
-                .memberId(memberId)
-                .memberSurveys(new ArrayList<>())
-                .build();
+        return new MemberSurveys(memberId, new ArrayList<>());
     }
 
     public void submitSurveys(final List<SurveySubmitCreateDto> requests) {