Add meta information to tasks

[alexpaxton]

Same as dashboards:

meta: {
  createdAt: date
  updatedAt: date
}

connect #2225

[desa]

I think this might belong to the tasks team, but I'm not certain.

@mark-rushakoff Who should own this?

[mark-rushakoff]

Adding it to the tasks backlog.

[mark-rushakoff]

Tasks report updatedAt and createdAt as of #11794. Removing blocking label.

[mark-rushakoff]

Actually, I'm unsure whether this issue is supposed to track the work in tasks that happened in #11794, or whether this is supposed to track something in the frontend. @alexpaxton should this issue be closed?

[alexpaxton]

@mark-rushakoff I believe this issue was just for tracking the API work