History of bump 5 changes

In crates/hub/src/diffusion.rs, lines 485–574 on d3b048b27277329d343d78bf508f6ac4c04766e8ef9ae64c13cdce55571a0397. 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.