add option for mid test troubleshooting

[thrombe]

user might need to change their network, or they might need to reboot due to technical problems.

but simply allowing this willy-nilly is bad.
some sort of system where they need to ask the test providers for a key would be better.

make the server have an admin api route that returns small one time tokens to temporarily disable the proctoring and return the explorer back to working state.

the idea here is that any user can ask the admins for one of these tokens when they want to troubleshoot. troubleshooting would be done in the presence of a proctor ideally.

remember to / suggestions:

• token expiration within a few minutes of creation.
• disable the actual test when troubleshooting
• would be better if the app does not need network access for the troubleshooting option
  • one way would be to have some sort system similar to OTP. (a simple time based salted algorithm. server generates the token, and it is checked with the same algo inside app. this seems fine here - as the user is not supposed to have any electronic devices which might be able to run this algorithm)
  • another way could be to leverage public key cryptography. have the server generate a small token, and have the client verify it