VLESS Reverse Proxy: Check burstObservatory immediately after inbound adds new reverse-mux to reverse-outbound (#5752)

Fixes https://github.com/XTLS/Xray-core/issues/5750

---------

Co-authored-by: RPRX <63339210+RPRX@users.noreply.github.com>

app/observatory/burst/burstobserver.go

@@ -32,6 +32,10 @@ func (o *Observer) GetObservation(ctx context.Context) (proto.Message, error) {
 	return &observatory.ObservationResult{Status: o.createResult()}, nil
 }
 
+func (o *Observer) Check(tag []string) {
+	o.hp.Check(tag)
+}
+
 func (o *Observer) createResult() []*observatory.OutboundStatus {
 	var result []*observatory.OutboundStatus
 	o.hp.access.Lock()