update_editor_month: Fix performance and typo
Using REPARTITION(1) rather than COALESCE(1) vastly improves performance by ensuring that the last stage of the job is run in parallel rather than as a single task.
A typo (event_entity='create'
rather than event_type='create'
) caused
the whole global_registration_dates subquery to select nothing, which
meant global_user_registration was always null.
Bug: T362594