fix: 에러 및 builder 경고 해결

- Hashtag와 Likes에 @Builder.Default 추가
- Spring과 commons-logging의 충돌을 피하기 위해 commons-logging.jar를 제거

build.gradle

@@ -57,6 +57,11 @@ dependencies {
 	testImplementation 'org.springframework.boot:spring-boot-starter-test'
 	testImplementation 'org.springframework.security:spring-security-test'
 	testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
+
+	//  Spring과 commons-logging의 충돌을 피하기 위해 commons-logging.jar를 제거
+	implementation('org.springframework.boot:spring-boot-starter') {
+		exclude group: 'commons-logging', module: 'commons-logging'
+	}
 }
 
 tasks.named('test') {

src/main/java/com/solucitation/midpoint_backend/domain/community_board/entity/Hashtag.java

@@ -22,6 +22,7 @@ public class Hashtag {
     @Column(name="hashtag_name", nullable = false)
     private String name;
 
+    @Builder.Default
     @OneToMany(mappedBy = "hashtag", fetch = LAZY)
     private List<PostHashtag> postHashtags = new ArrayList<>();
 }

src/main/java/com/solucitation/midpoint_backend/domain/community_board/entity/Likes.java

@@ -28,6 +28,7 @@ public class Likes {
     @JoinColumn(name="member_id", nullable = false)
     private Member member;
 
+    @Builder.Default
     private Boolean isLike = true;
 
     @CreationTimestamp