Use annotations to post ML algorithm scores

[bfhealy]

I think the best way to post DNN/XGB scores to Fritz is using annotations. The scope_manage_annotation.py script can be used to upload these annotations in bulk, but at the moment it only works with one type of annotation at a time. We should update this to allow multiple origins/keys/values for each source to be uploaded with one call of the script.

[bfhealy]

It is easiest to filter and scan sources by classification; the strategy in this issue is no longer the optimal approach. Instead, there will be multiple Fritz groups for high-confidence sources classified by DNN, XGB, and those with disagreeing classifications.