Function to generate result json from results in database

[edward-burn]

At the moment I don't think there is any easy way to generate the result json from the results saved in the database. I was in this situation with someone else having run DQD and so I can see the results in the database but could not see a way to get the json results without having to rerun the analysis. That was until @MaximMoinat shared some bespoke code that meant I could do this. It would I think be helpful to make this a function of the package if possible.