윤정민
38a2f78647
dailyArchive wrote users/{uid} twice per cron run: once for rankSnapshot
and once for the judgment. Extract the read-only computeRankSnapshot, then
pass the pre-judgment snapshot into judgeDay so applyDailyJudgmentTx merges
it into the same patch as the judgment write. The snapshot is computed from
current (pre-judgment) tierPoints before the transaction, preserving the
"rank BEFORE judgment" semantics; on the idempotent guard-skip path no
write occurs (and stale re-snapshotting is avoided). snapshotRankForUser is
kept as a thin wrapper for its existing callers/tests.