Relax freshness limits and tolerate transient RCON failures

src/lib/server-freshness.ts

@@ -1,6 +1,6 @@
-// Allow a polling cycle plus time for queued RCON requests and delivery.
+// Allow missed polling cycles and queued requests across all status evidence.
 export const STATUS_REFRESH_MS = 30_000;
-export const ONLINE_MAX_MS = STATUS_REFRESH_MS + 15_000;
+export const ONLINE_MAX_MS = 90_000;
 // The UI clock ticks once per second and can trail a newly arrived report.
 const CLOCK_TOLERANCE_MS = 1_000;