History of scheduler 2 changes

In crates/hub/src/flow.rs, lines 2371–2385 on b349e15a3eab6ff9436d9e4d39833a98fe7d3217bf79a7b77b72a3dad658d6fe. 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 2371,2385:crates/hub/src/flow.rs.