Reflect Failed Status for Path Browser Tasks Terminated Externally

NetBrain does not currently update a Path Browser task's status to Failed when the task process is terminated externally, such as through a system task manager. As a result, the task status may remain inaccurate or unclear, leaving no reliable indicator that the task did not complete successfully. This enhancement would detect external termination of a running Path Browser task and update its status to Failed accordingly. Accurate status reporting would give customers confidence in monitoring task outcomes and would reduce the need for manual verification when a task is unexpectedly stopped.