Ignore SIGINT/SIGTERM only when fork IPC is active (process.send) so terminal signals do not race the kernel shutdown in nerve dev, without breaking standalone worker CLIs (fixes#55).
Pipe worker stderr through the parent with a rolling capture buffer; log exit signal name and stderr tail on worker exit (fixes#56). Apply the same exit logging to workflow workers.
Made-with: Cursor
xiaoju
f1458f8353