Refresh Absence.AllStatisticsData table more often

Currently the statistics in this table only get flagged to update for an employee when a change is made to an absence for them.

This table is used on a number of standard reports and dashboards and when a new holiday year starts the statistics are not updated to include any additions that come into effect.

This then leads to employees reporting they have less absence than expected and HR admins being unable to accurately report without going directly into an individual employee's statistics.