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Marc-André Bombeck
1d8e2e0ee3
On an account with tens of millions of readings the boot full backfill never finished. It ran four aggregates over the whole five-year window, each held to the connection's 60 s statement limit, so every attempt was cancelled with 57014, the reading extremes added by 0417 stayed NULL, and the readers that need them fell back to the raw table and timed out as well (#1298). The full backfill now folds the window one UTC calendar year per pass, newest first, and every statement runs under its own five-minute limit, the shape the pulse day-mean rebuild already uses. Calendar-year cuts write exactly the buckets one pass writes: day, month and year buckets fall inside one window and a week across New Year is folded whole by both. Each window commits on its own, so a run that reaches its job budget hands the remaining years to a follow-up job instead of failing and starting over on the retry. The boot discovery read every live reading in the window to find uncovered days, the same scan that kept the fold from finishing. It now walks the days per account and type off the live index, so its cost follows the number of days with readings, and runs under the same limit. The full backfill code moves to its own module.