feat: 어드민에서 선택기를 고급화 #127

Job	Run time
config	3s
build (admin-dev, pyconkr-admin)	1m 7s
build (pyconkr-dev, pyconkr-2026)	1m 0s
build (participant-dev, pyconkr-participant-portal)	50s
trigger	5s
	3m 5s

Provide feedback