History of copy 2 changes

In crates/flow/src/cache.rs, lines 521–526 on 48ed8a1db369b9e66b3e2175a6a56d04df3d57e2629d1972e1d36c7e1d6b8d82. 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 521,526:crates/flow/src/cache.rs.