systemctl --user restart hermes-gateway run via the terminal tool is a
child of the gateway itself. When systemd delivers SIGTERM the gateway
kills this subprocess before it can complete, so the service may never
restart — reproducing issue #37453.
The hermes gateway restart/stop guard (hermes_cli/gateway.py) and the
cron-path guard (hermes_cli/cron.py) already block equivalent commands
in their respective paths but the terminal tool had no such defense.
Add a hard-block before command execution in terminal_tool: when
_HERMES_GATEWAY=1 and the command matches _contains_gateway_lifecycle_command,
return an error immediately. force=True cannot bypass it — unlike the
normal dangerous-command approval flow, here even a user-approved restart
would fail because the SIGTERM propagates to child processes.
Also extend _GATEWAY_LIFECYCLE_PATTERNS to match systemctl with flags
(e.g. systemctl --user restart) — the previous regex required the
action word immediately after systemctl with no flags in between.
Adds 9 regression tests: 6 blocked variants (parametrized), force bypass
attempt, safe systemctl passthrough, and guard-inactive-outside-gateway.
245b95b094