Add hook to init and listen observatory statuses

app/observatory/persist.go

@@ -0,0 +1,12 @@
+package observatory
+
+func (o *Observer) UpdateStatus(result *OutboundStatus) {
+	o.statusLock.Lock()
+	defer o.statusLock.Unlock()
+
+	if location := o.findStatusLocationLockHolderOnly(result.OutboundTag); location != -1 {
+		o.status[location] = result
+	} else {
+		o.status = append(o.status, result)
+	}
+}