fix : ParticipantRepository (#60)

memberId -> userId로 수정하였습니다.

Author: garusitell

src/main/java/sevenstar/marineleisure/meeting/repository/ParticipantRepository.java

@@ -23,7 +23,7 @@ public interface ParticipantRepository extends JpaRepository<Participant, Long>
 
 	boolean existsByUserId(Long userId);
 
-	boolean existsByMeetingIdAndMemberId(Long meetingId, Long memberId);
+	boolean existsByMeetingIdAndUserId(Long meetingId, Long memberId);
 
-	List<Participant> findByMemberId(Long memberId);
+	List<Participant> findByUserId(Long memberId);
 }

src/main/java/sevenstar/marineleisure/member/service/MemberService.java

@@ -182,7 +182,7 @@ public void deleteMember(Long memberId) {
 		}
 
 		// 2. 회원이 게스트인 경우 참가자 목록에서 삭제
-		List<Participant> participations = participantRepository.findByMemberId(memberId);
+		List<Participant> participations = participantRepository.findByUserId(memberId);
 		if (!participations.isEmpty()) {
 			log.info("참가자 목록에서 삭제: memberId={}, participationCount={}", memberId, participations.size());
 			participantRepository.deleteAll(participations);