Replace argument recovery with direct build targets. Run host, target,
board, coverage, Miri and selected Kani checks while retaining source
identities, logs and artifacts, including failed attempts.
Keep the PID proof diagnostic exception explicit and match its exact
identity alongside passing contract assertions and covers.
Validation: final-source verification matrix, assembled workflow tests
and documentation build.
Remove the retired simulator workspace member, dependencies, workflow
and documentation. Keep the shared flight and hardware crates.
Validation: retirement prefix host check, command-dispatch tests and
book build.