History of checkpoint 1 change

In crates/hub/src/flow.rs, lines 1458–1474 on 0bc95135954de9e9011169e25ec4dcdfbf6b7746800ffa79d0b580e0f08f2d88. 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.