History of bump 5 changes

In crates/hub/src/diffusion.rs, lines 238–327 on close-proposal-140. 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 238,327:crates/hub/src/diffusion.rs.