History of tiers 3 changes

In crates/flow/src/runner.rs, lines 359–378 on a4b3f8cb9aae8aa50c1f6cc4b8cfc136f7da55dedd90ddf74e9a64b0b5b1c45a. 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 359,378:crates/flow/src/runner.rs.