[fix] 모임 가입자 조회 API 쿼리 파라미터 추가

src/main/java/org/kkumulkkum/server/controller/MeetingController.java

@@ -63,9 +63,11 @@ public ResponseEntity<MeetingDto> getMeeting(
     @IsMemberByMeetingId(meetingIdParamIndex = 0)
     @GetMapping("/v1/meetings/{meetingId}/members")
     public ResponseEntity<MembersDto> getMembers(
-            @PathVariable final Long meetingId
+            @PathVariable final Long meetingId,
+            @RequestParam(name = "exclude", required = false) final String exclude,
+            @UserId final Long userId
     ) {
-        return ResponseEntity.ok(meetingService.getMembers(meetingId));
+        return ResponseEntity.ok(meetingService.getMembers(meetingId, exclude, userId));
     }
 
 }

src/main/java/org/kkumulkkum/server/domain/Participant.java

@@ -11,6 +11,11 @@
 @Entity
 @Getter
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
+@Table(
+        uniqueConstraints = {
+                @UniqueConstraint(columnNames = {"promise_id", "member_id"})
+        }
+)
 public class Participant extends BaseTimeEntity {
 
     @Id

src/main/java/org/kkumulkkum/server/service/meeting/MeetingService.java

@@ -85,8 +85,12 @@ public MeetingDto getMeeting(final Long meetingId) {
     }
 
     @Transactional(readOnly = true)
-    public MembersDto getMembers(final Long meetingId) {
+    public MembersDto getMembers(final Long meetingId, final String exclude, final Long userId) {
         List<MemberDto> members = memberRetreiver.findAllByMeetingId(meetingId);
+        if (exclude != null) {
+            Member authenticatedMember = memberRetreiver.findByMeetingIdAndUserId(meetingId, userId);
+            members.removeIf(member -> member.memberId().equals(authenticatedMember.getId()));
+        }
         return MembersDto.from(members);
     }