History of scheduler 2 changes

In crates/hub/src/flow.rs, lines 1472–1486 on 2fb70d0198515f0e9fab3613cb4da69339ce05f2e2c1f336a9f5ff0efb29500b. 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 1472,1486:crates/hub/src/flow.rs.