Get run

Get one run: overall status plus per-node results and output URLs. Poll this after run_pipeline, assemble_video or edit_asset until the status is no longer "running". A finished run carries outputs, what its Output nodes returned (for assemble_video and edit_asset, the finished file). While a run is still "running", nodes lists the steps that have completed so far (with their outputs) progress says how many of how many and what it is working on now, pollAfterSec is how long to wait before calling again, and finishedAt/durationMs are omitted. Clients that show panels follow the render in the panel, so there is no need to poll faster than pollAfterSec.