Improve handling of notebook status

[Kayle-Verhiel]

As a researcher I want to see real-time status and logs of my running workflows, so that I can see the computing is working.

[enekoreto]

I don't understand the description

[Kayle-Verhiel]

I don't understand the description

The ticket describes that metadata concerning the computation should be reflected in the frontend. So a pending state when the computation is busy; or how much is the computation going to cost if you run it? and how much did the computation eventually cost.

[GiorgosNik]

This is partly done, but not completely satisfactory.
I.e. in some error cases, the status stays on Provisioning, and logs are not always available if the container creation fails.
We need to reason about how we get logs in that case.