fix: watchdog killing backend every 60s on .198 (47 restarts/day)

Root cause: sd_notify::notify(true, ...) cleared NOTIFY_SOCKET env var,
so watchdog pings never reached systemd. Backend killed every 60s.

Fixes:
- Change sd_notify::notify first param to false (keep socket)
- Increase WatchdogSec from 60 to 300 (5min) for crash recovery
- Add TimeoutStartSec=300 for slow container startups
- Adjust watchdog ping interval to 120s

This was causing 47 restarts/day on .198 and blocking REBOOT-03,
FLEET-03, FLEET-04, VC-04.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

core/archipelago/src/main.rs

@@ -135,11 +135,12 @@ async fn main() -> Result<()> {
     info!("WebSocket: ws://{}/ws", addr);
 
     // Notify systemd that we're ready (Type=notify)
-    let _ = sd_notify::notify(true, &[sd_notify::NotifyState::Ready]);
+    // Note: first param `false` keeps NOTIFY_SOCKET so watchdog pings work
+    let _ = sd_notify::notify(false, &[sd_notify::NotifyState::Ready]);
 
-    // Spawn systemd watchdog ping (WatchdogSec=60, ping every 30s)
+    // Spawn systemd watchdog ping (WatchdogSec=300, ping every 120s)
     tokio::spawn(async {
-        let mut interval = tokio::time::interval(std::time::Duration::from_secs(30));
+        let mut interval = tokio::time::interval(std::time::Duration::from_secs(120));
         loop {
             interval.tick().await;
             let _ = sd_notify::notify(false, &[sd_notify::NotifyState::Watchdog]);

image-recipe/configs/archipelago.service

@@ -12,7 +12,8 @@ ExecStartPre=/bin/bash -c 'mkdir -p /etc/archipelago && echo "ARCHIPELAGO_HOST_I
 ExecStart=/usr/local/bin/archipelago
 Restart=on-failure
 RestartSec=5
-WatchdogSec=60
+WatchdogSec=300
+TimeoutStartSec=300
 
 [Install]
 WantedBy=multi-user.target