turn_in_flight read only the dashboard session table; an in-process cron run
never registers there, so the watchdog reported "no running turn" and exited
mid-job (tool calls then failed with "cannot schedule new futures after
interpreter shutdown", the execution was marked unknown, the slot lost). The
probe now also consults cron.scheduler.get_running_job_ids — the ledger the
gateway shutdown drain already uses.
Addresses #107485
Teknium