Support bidirectional path calculation through Internet Cloud and MPLS L3 Cloud objects

NetBrain path trace currently calculates paths correctly from an internal device toward an Internet Cloud or MPLS L3 Cloud object, but does not reliably calculate the reverse path, from the cloud object back to the internal destination address. This enhancement would extend the path calculation engine to support accurate bidirectional tracing through Internet Cloud and MPLS L3 Cloud objects, so that paths originating from these cloud representations resolve correctly to the intended internal destination. Customers who rely on path trace to troubleshoot inbound traffic flows would gain complete, accurate visibility in both directions without needing manual workarounds.