Feature Request: Query Result History

I think it'd be really awesome if we could view previous result sets for each query. There are a lot of DBA-like tasks where you're looking for changes in a certain query, and being able to flip back through previous runs (perhaps with highlighting of the cells that change!) would be very useful. Perhaps we would want some constraint on the number of such result sets that get stored.

No files, tests, or entry points are identified in the issue. Start by locating the query execution and result-display paths, then define the storage limit, history behavior, and changed-cell highlighting before implementation; done means previous result sets can be viewed for a query.

Written by the indexing model from the issue text.