[stats] relays/stats

[dskvr]

Existing stores lend themselves to this case extremely well. Will be surprisingly simple to start with a view that supports multiple visiblity options and user-selectable dimensions to aggregate data in a large number of ways.

No further dependencies required for initial release of this feature.

Notes:

• Develop with an orthogonal approach, similar to the DataTables, so that "shortcuts" can be easily implemented for UX reasons, but result possibilities remain open-ended and flexible.