To be able to measure the actual impact of the lil diff solution on the overall recent changes, we need to be able to determine the number of the "would have been" unnecessary Recent Changes by incrementally recording each occurence.
This ticket is related to https://phabricator.wikimedia.org/T422564 as small subtask
Acceptance Criteria:
- Original Recent Changes Count in Change Handler are tracked.
- Lil Diff suppressed recent changes are tracked
- Lil Diff injected recent changes with "yes" tracked
- Lil Diff injected with "unknown" tracked.
Note: We would hope the first metric would be equal to the sum of the last three metrics on the list above.