[#] 미팅방 서비스 관련 검증 로직 보강 및 트랜잭션 적용

app.js

config/sequelize.js

controllers/meetingController.js

controllers/scheduleController.js

dtos/CreateMeetingRequestDTO.js

dtos/FriendListDTO.js

dtos/FriendResponseDTO.js

dtos/MeetingDetailResponse.js

dtos/MeetingDetailResponseDTO.js

dtos/MeetingResponse.js

dtos/MeetingResponseDTO.js

dtos/ScheduleRequestDTO.js

dtos/ScheduleResponseDTO.js

jest.setup.js

models/Friend.js

models/meeting.js

models/meetingParticipant.js

models/user.js

package-lock.json

package.json