The live comment poller inferred completion from the job list. An empty
job list looks the same as a finished run: GitHub has not spawned the
jobs yet, so nothing is pending, and the poller posted a final
"all good!" comment and exited.
The run status is now the authoritative signal. collect_run_jobs()
returns whether the CI run and every watched sibling run report
status=completed, and the loop exits only when no job is pending AND
all runs are complete. While a run is still queued or in progress with
no visible jobs, the comment shows "waiting for jobs to start" instead
of a final banner.
