Louis: logging questions and answers on the server

[martin-henz]

The Louis feature (under development, see #2813) should log questions and answers on our server so that we can monitor its usage and performance. This enhancement request should not prevent deployment of Louis.

[RichDom2185]

Good to note, on the same vein: source-academy/backend#1113

[RichDom2185]

Closed by #3010