Same bug class as the wake-gate call fixed in the picked commit: when a caller
invokes _build_job_prompt without a cached prerun_script, the sibling ran the
job's script inline via _run_job_script(script_path) and dropped the job's
configured workdir, so the script ran from the scripts-dir parent. Route it
through _resolve_job_workdir like the no_agent and wake-gate sites already do.
Sweep of every _run_job_script / _run_job_script_with_claim_heartbeat caller:
_run_no_agent_job and cron/monitor.py already pass workdir; the wake-gate site
is fixed by the salvaged commit; this was the last one.
66884c4397