History of CasFs::lookup 1 change

In crates/flow-casfs/src/main.rs, lines 202–210 on f3b5b86e23ef1fa5ed4c34c1d67951fc40cc765648fbb2571232add4eeec4406. 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 202,210:crates/flow-casfs/src/main.rs.