upkeep: add unit tests for `create_interactive_report`

[jdhoffa]

This is going to be a lot of work lol.

Relates to #30

[MonikaFu]

Agreed :) But up for it. Do we have a good instance of test data?

[jdhoffa]

Nope! 😂

but we're working on it: https://rmi.monday.com/boards/6443948696/pulses/6456608194