fix: prevent exposure of database error messages in GET comment response

app/infrastructure/comment.go

@@ -5,6 +5,7 @@ import (
 	"time"
 
 	"github.com/jmoiron/sqlx"
+	"github.com/pkg/errors"
 )
 
 type CommentRepository interface {
@@ -35,7 +36,7 @@ func (ur *commentRepositoryImpl) SelectCommentsByWorksID(worksID string) ([]*ent
 
 	rows, err := ur.db.Queryx(query, worksID)
 	if err != nil {
-		return nil, err
+		return nil, errors.New("failed to retrieve comments")
 	}
 	defer rows.Close()
 
@@ -49,15 +50,15 @@ func (ur *commentRepositoryImpl) SelectCommentsByWorksID(worksID string) ([]*ent
 			&comment.CommentUserProfile.DisplayName, &comment.CommentUserProfile.Icon,
 		)
 		if err != nil {
-			return nil, err
+			return nil, errors.New("failed to parse comment data")
 		}
 		comment.CreatedAt, err = time.Parse("2006-01-02 15:04:05", string(createdAt))
 		if err != nil {
-			return nil, err
+			return nil, errors.New("failed to parse created_at timestamp")
 		}
 		comment.UpdatedAt, err = time.Parse("2006-01-02 15:04:05", string(updatedAt))
 		if err != nil {
-			return nil, err
+			return nil, errors.New("failed to parse updated_at timestamp")
 		}
 
 		comments = append(comments, &comment)