Add MirrorStatus.LastStarted property

[phy25]

I would like to propose adding a new status property LastStarted saving textTime and the respective LastStartedTs property for each job, which will be updated in Server.updateJobOfWorker during the following state change condition:

• status.Status is in PreSyncing (AFAIK this is a mandatory state..?), and
• curStatus.Status is not in PreSyncing

I think I can develop it, but just want to know if there is any interest in this functionality (and would probably be merged) before I do so.

[z4yx]

It's a good feature. With these fields, our website can show how long the job has taken.

PreSyncing is a mandatory state, you can rely on that.

Thanks for helping us.