Batch calculation produces unreasonably large output files

Calculating the breakdown or impact ranking using the BatchCalculation actions in SFramework produces one results txt file per calculation. However, these can easily be ~1-10 MB (in one particular example: 7MB each) which is unreasonably large. We should at least provide an option to reduce the amount of highly redundant information contained within these files (e.g. the initial parameter values are all identical across the different calculations and use a considerable amount of storage when replicated around 250 times; another example: 250x250 correlation matrix for each fit is also somewhat excessive).

Reducing the size of these files can also be expected to greatly reduce the time needed for plotting the breakdown/impacts/pull plots where the collection of the breakdown/impact results is by far the longest step in a typical fit result plotting run.

Tagging @cburgard for ideas/comments