The resilient restart settings from PR #18639 only took effect when
the gateway was started via `hermes gateway start` or `hermes gateway
restart` — both of which call refresh_systemd_unit_if_needed() which
writes the new unit and runs daemon-reload.
However, when the gateway self-restarts via exit-code-75 (stale-code
detection after `hermes update`, or the /restart command), systemd
respawns the process directly without going through any CLI function.
The unit file on disk stays stale, and systemd keeps using the old
cached settings (StartLimitBurst=5, RestartSec=30) until someone
manually runs `hermes gateway restart`.
This meant that after PR #18639 was deployed, users who never ran
`hermes gateway restart` manually were still vulnerable to the
permanent-death-on-network-outage bug.
Fix: call refresh_systemd_unit_if_needed() at the top of run_gateway()
(the foreground entry point that systemd's ExecStart invokes). This
ensures that on every boot — whether triggered by systemd restart,
exit-75 respawn, or manual foreground run — the unit definition and
daemon state are current. The call is best-effort (exceptions caught)
and a no-op when the unit is already current (one stat + string compare).
Siddharth Balyan
af6f9bc2a1