* ci: unify validation planning, artifacts and suite orchestration * fix(ci): preserve JSON diagnostics for release checks * fix(ci): keep manual attempts without plans visible * fix(ci): distinguish nextest setup scripts from test results * ci: reuse extracted archives and consolidate duplicate checks
* feat(ci): measure queue and execution time by run attempt * fix(ci): bound timing samples and recognize the old workspace lane * fix(ci): sample completed runs for stable timing comparisons