Lists every recorded execution of a launch run's workflow — oldest-first — with each attempt's outcome, timestamps, and diagnostic summary/details. A cumulative launch bill spans retries, so this surfaces why earlier cold executions failed rather than only the newest transcript. For a caller with workspace-admin permission, a failed execution is flagged artifactAvailable; download its archive from /launch-runs/:id/artifact?attempt={attempt}. Returns an empty list when no execution has recorded metrics yet.