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Marc-André Bombeck
1cfae83578
readAllTimeExtremes read every raw reading of weight, blood pressure and pulse twice on each call, a sequential pass over the measurements table that made it the largest read on the database. The DAY tier already holds the same per-source day fold except for the extremes of the readings themselves: min_value and max_value widen to a row's own intra-hour range. Migration 0417 adds reading_min_value and reading_max_value to measurement_rollups. The writer fills them from the same aggregate, and the boot re-fold refills existing rows through the arm that already watches sum_xy. The reader folds the tier for whole UTC days inside the fold window and the raw rows for the rest: older days, the partial day a lookback floor falls in, and any type whose tier rows lack the new columns. The raw arm reads narrow columns once instead of twice. An integration test compares the result with the previous query on a seeded history with two sources per day, hourly pulse statistics with their own range, readings older than the window, midnight edges and deletions, and shows the tier is the path that answers.