Files downloaded in BatchRunner appear to be unnecessarily large

I note that the content of the folder for each run is duplicative and I wonder if there is an opportunity to reduce the size of the downloads, without incurring a heavy additional load for processing locally (which we definitely wouldn't want).

The folder for each run looks something like this (this is specially in the case of scenario_effect_of_each_treatment-2022-05-31T160914Z).

It appears to contain the same information 3 times:

• The complete simulation log (compressed): ~27MB
• The individual log files for each module (compressed): total ~27MB
• The pickles of the results of running parse_log on each of the above: > 300MB

The result is that what is downloaded is about 10x bigger than what is strictly needed and the biggest files (the pickles) are not compressed.

(NB. I only notice on a set of runs that were very large and had probably too many logs included, and the download has taken many hours. This is probably an edge case, so this may not be a high priority).