pub fn filter_as_of(
snapshots: Vec<SnapshotListEntry>,
cutoff: Option<DateTime<Utc>>,
) -> Vec<SnapshotListEntry>Expand description
Keep only snapshots taken at or before cutoff (point-in-time selection),
preserving order so it composes with pick_offset: filter first, then
offset (“the previous one as of last Tuesday”). None keeps the full list.