Additional detail in Scratch Card activity event

[lukeoftheshire]

I think this is probably low priority, but it would be nice to increase the information contained in the scratch card activity events. Here is an example of a temporal slice array where I did 1 card:

 'temporal_slices': [{'duration': 60968,
     'item': 1,
     'level': None,
     'type': None,
     'value': None}]

Currently, there is no record of which card was shown to the user, but it might be worth considering if using value to store this information would be helpful.

[avaidyam]

I think if we're going to improve this data output we should at least be getting a temporally ordered SVG path mask that allows us to recreate the "brush strokes" the patient made to reveal the image. This way we could also investigate the deliberation, cadence, finger jitter, etc.