Updates: * the API endpoint to create the graph network topology was split into two endpoints - POST and PUT methods * POST /graph/network creates the network topology, but doesn't update the latency of existing network edges * PUT /graph/network creates the network topology and updates the latency of existing network edges * new API endpoint (GET /graph/monitor/<request_id>) to fetch the status of a graph monitoring process * updated IPREGISTRY to include the usage of the psutil external library (BSD license) for more robust management of background processes