Count retained samples before allocating detached snapshots for guest, node, disk and storage readers. Preserve exclusive cutoffs, unordered inputs, original observations and empty arrays. Cover public series, snapshot isolation, connected chart/window consumers and same-executable allocation comparisons; no SQL, retention or source-selection change.
Change-source: pulse-maintainer
Contract-Neutral: In-memory History copy allocation only; public API/JSON shape, sample order/cutoffs, retention and observation authority are unchanged.
pulse-triage[bot]
fcd9b65b82