Audit log is updated at the time of document creation, on the doc itself per # 1 above
To get a list you would need to download every single document and aggregate the data you're looking for. Alternately, you may be able to do some of this with a couch2pg instance - but I don't think couch2pg gets the data from medicdb for contact docs.
I believe this tool has an audit log feature. We should document this: