Haewon Kam e43cc08429 Voting window decided: open D-2 (kickoff-48h), close at kickoff ... - types/schedule: add opensAt (kickoff-48h), lockAt = kickoff (정각) - Arena: 3-state gating (곧 오픈 / 활성 / 예측 마감), DEMO_FORCE_OPEN flag - seed.mjs, BACKEND.md, 기능정의서: lock semantics = kickoff, opensAt added - error codes: MATCH_NOT_OPEN (422) before opensAt, MATCH_LOCKED (423) at kickoff Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>		2026-06-09 11:18:26 +09:00
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seed.mjs	Voting window decided: open D-2 (kickoff-48h), close at kickoff	2026-06-09 11:18:26 +09:00