Say I have a VMSS. I have a vm with id = 0 in this VMSS. Then I update the VMSS model. Now I know the VM has not been upgrade to the latest VMSS model through the field LatestModelApplied. Now I continue to upgrade the VM and reimage the VM. How can I know whether the VM has been reimaged? Any signals, similar to LatestModelApplied, that I can leverage?

