Add processing time and date to dumps status

[bidoubiwa]

Is your feature request related to a problem? Please describe.
For the moment the dump status looks like this

{
   "uid": 123,
   "status": "done"
}

There is missing information on how much time a dump is made. Information that could be relevant when adding the dump in a scheduled task.

Describe the solution you'd like

We should also add the following: createdAt, processedAt, duration.

With the same idea as the update body:

{
  "status": "processed",
  "updateId": 1,
  //...
  "duration": 12.757581815,
  "enqueuedAt": "2019-12-07T21:10:07.607581330Z",
  "processedAt": "2019-12-07T21:10:20.511525620Z"
}

[CreaTorAlexander]

Hey, I would like to do this can I get some more informations?

[curquiza]

Fixed by the integration of the new search engine in #1421