feat: add system instance info panel (#5716)

* feat: add system instance reporting

* feat: show system instance resources

* fix: update translations for heartbeat messages in Russian and Vietnamese

main.go

@@ -117,6 +117,10 @@ func main() {
 	// Subscription quota reset task (daily/weekly/monthly/custom)
 	service.StartSubscriptionQuotaResetTask()
 
+	// Report this process as a system instance so the System Info page can show
+	// all currently alive nodes in multi-instance deployments.
+	service.StartSystemInstanceReporter()
+
 	// Wire task polling adaptor factory (breaks service -> relay import cycle).
 	// Must run before the system task runner starts: the async_task_poll handler
 	// calls service.RunTaskPollingOnce, which needs this factory set.