History of CloudStore::block 3 changes

In crates/oxy-strata/src/lib.rs, lines 616–641 on 795b8b502dedd45bc3959c80eec48b43082faf9596e1133f71df0b70724abf1f. 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 616,641:crates/oxy-strata/src/lib.rs.