Shivam Patel e47a719d79 Fix 24h bar timezone mismatch and add time-interval uptime calculation ...

Bars were all grey for 24h view because SQL bucket keys (UTC) never
matched frontend keys (local timezone). Added toUTCKey() helper to
generate UTC keys for all ranges. Replaced check-counting uptime with
time-interval method for 24h/7d: time between consecutive up checks
counts as uptime, intervals involving down checks count as downtime,
uncovered time is unknown.

2026-02-09 04:15:34 -05:00

28 KiB

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