History of scheduler 2 changes

In crates/hub/src/flow.rs, lines 1197–1211 on c987c86513df8e00d726ae32c83c2479e950290ab40e2228992888df7938d2fc. 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 1197,1211:crates/hub/src/flow.rs.