History of Retention::default 2 changes

In crates/hub/src/config.rs, lines 245–247 on close-proposal-140. 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 245,247:crates/hub/src/config.rs.