History of bump 5 changes

In crates/hub/src/diffusion.rs, lines 485–574 on 00ef7b83b340a7fd53544c0a8a4e63a1f79c0b0a4a7d6f2ec554722988ff46d1. 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 485,574:crates/hub/src/diffusion.rs.