History of open 4 changes

In crates/oxy-strata/src/gcp.rs, lines 31–70 on v0.4.2. 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 31,70:crates/oxy-strata/src/gcp.rs.