History of CloudStore::block 3 changes

In crates/oxy-strata/src/lib.rs, lines 616–641 on 80b069facc699214ba6ae4ad9f9c943df79f1089d3502c4b0fe19082098b3252. 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.