When systemd_restart / systemd_status / systemd_stop run under sudo,
HERMES_HOME is stripped and HOME=/root, so get_hermes_home() resolves
to /root/.hermes instead of the unit's pinned home. read_runtime_status
and get_running_pid then look at the wrong gateway_state.json — the
60s status poll never sees "running", times out, and forces another
systemctl restart that SIGTERMs the in-progress new gateway.
Read the unit's pinned HERMES_HOME from `systemctl show -p Environment`
and mirror it into os.environ before any HERMES_HOME-derived read.
Early-out when system=False (user-scope inherits naturally). Errors
swallowed so a transient systemctl failure doesn't break unrelated
CLI ops.
Closes#22035.
1508dcb9c2