History of CloudStore::block 3 changes

In crates/oxy-strata/src/lib.rs, lines 616–641 on b5e98094eb8fc7123b7331db9a051e6deb771db299e8ab60b6d3e5312d1e6dd3. 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.