IndividualStatisticsPresenter and user profile page rely on Revisions table

[ragesoss]

We are deprecating the Revisions table and have removed old revisions from the production databases. However, the user profile pages — particularly, the feature for showing 'contributions as a student' — still relies on data from this table.

We need to either update the way this works so that it does not rely on the Revisions table (which may mean displaying a more limited amount of stats) or just remove this feature entirely.

[osujipius]

I will work on this

[EmmanuelEmp]

@ragesoss I would also like to work on this. After looking through the IndividualStatisticsPresenter query logic responsible for extracting the data, I was thinking if it was okay for the statistics section of the dashboard to now focus on articles created by a student rather than those edited (i.e. revisions).