This read-only object reports the current lifecycle state of a timeline specification, moving to statusCaptured once the capture completes and the sampled data becomes available. As with histograms, the desc notes that none of the timeline's parameters can be modified while status is statusInProgress, and a completed or stopped timeline must be cleared via p2mpTlAction before it can run again. For example, an admin who just set p2mpTlRowStatus to createAndGo would poll p2mpTlStatus until it shows statusCaptured before attempting to read the resulting samples.