History of propose 7 changes

In crates/hub/src/diffusion.rs, lines 901–1029 on diffusion-pin-bookmark. 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 901,1029:crates/hub/src/diffusion.rs.