refactor: 어드민 내부 목록 관련 개선 #133

Job	Run time
config	2s
build (participant-dev, pyconkr-participant-portal)	47s
build (admin-dev, pyconkr-admin)	59s
build (pyconkr-dev, pyconkr-2026)	58s
trigger	5s
	2m 51s

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