History of preflight 1 change

In crates/flow/src/runner.rs, lines 515–534 on 8bf49b95b09e44880ae317bf6ad6de2c3c4166698a18a93fd53b7520c48bcc5a. 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 515,534:crates/flow/src/runner.rs.