History of scheduler 3 changes

In crates/hub/src/backups.rs, lines 1764–1782 on 262ec9c51a5c37c68b17e6e78ad6c5583ee8f7a0b8debdc9d81b1454e878358f. 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.