The WikimediaEditorTasks extension creates the following new tables:

• wikimedia_editor_tasks_keys — Associates counter identifier strings defined in the extension config with numeric IDs.
• wikimedia_editor_tasks_counts — Stores counts per user and language of actions meeting the criteria for implemented counters.
• wikimedia_editor_tasks_targets_passed — Stores per-user records of having met target count(s) for defined counters.