Expand statistics to include all other metadata #10
Description
From microbiomeComputations created by asizemore: VEuPathDB/microbiomeComputations#40
See discussion in #37 for more details
The stats endpoint will be used for extra compute data and information that's not related to compute variables. So all those things like droppedColumns and computationDetails and such that we're tracking should all be going out with stats.
Even if we dont add all the possible slots to stats now, the main part of this task will be structuring @statistics and checking that all parts are writing to json as they should.