History of checkpoint 1 change

In crates/hub/src/flow.rs, lines 1458–1474 on 1062a0f8e985bb8c65ab90ccae6309f38730152b13ca9e9c579d6f5751053161. 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 1458,1474:crates/hub/src/flow.rs.