History of CloudStore::block 3 changes

In crates/oxy-strata/src/lib.rs, lines 616–641 on ee130dd9eef23d3479ff18c9c91ba1f7055c31aa59440ab1d568fce21672d148. 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.