Use the shared command supervisor for installation probes and retain exact
process cleanup owners through doctor, profile resolution, and session health.
Preserve exit status, bounded captured output, cancellation reasons, and live
cleanup facts. Block subsequent inspection until retained cleanup is retried.
Generalize the existing inspection resource scope and migrate its consumers,
including verifier scripts; remove the verifier's duplicate raw version probe.
Validation: 116 distinct focused tests passed, including built CLI doctor with
inherited output, cancellation/finalization, cleanup retry, and fake-provider
verifier workflows. Build, check:fast, and test discovery passed. No real Kuna
distribution or analysis target was executed.
Synthetic Darwin inspection timing: first-call median 707ms versus 5.79ms;
same-process repeat 37.9ms versus 3.08ms. First use includes ownership-helper
preparation. Family CPU and actual peak family memory remain unmeasured.
Fixes#5557
morluto
ff78165978