History of scheduler 3 changes

In crates/hub/src/backups.rs, lines 1764–1782 on d9d0d314fdcbc309903206d93879124522323789dd8f8d2d28c7c92acb4bb52f. Every change that wrote or deleted one of these lines, or deleted a line from between them. Exact, because each line keeps its identity across edits; edits elsewhere in the file are not here. Also: oxy log -L 1764,1782:crates/hub/src/backups.rs.