Session completion status on Alyx for dynamic pipeline

[oliche]

With the dynamic pipeline we do not have a principled manner to check the completion of extractions.

We can prioritize working on the Alyx interface as it is easy:

In the session admin page

• Sort tasks by status
• Sort datasets by status

In the summarized session page

• Add task recap (n failed or similar indicator)
• add the sign-off keys recap (N over M)

In the reports page:

• Create a generic interface that gets the notes and plots
• Plot the QCs
• Add the sign-off keys
  Here we would probably start with non-training tasks