Leavers shouldn't have their details changed as part of automated processes

As an example, the functionality which reassigns a leaver's direct reports to another person should not affect any historic direct reports who have already left the business. Those reports records need to stay as they are for data integrity purposes, and not be included in the automated process reassigning people when their manager leaves the company.

On the date that the manager's employment ends, all direct reports that have already left or leave on the same date should be excluded from the reassignment process, so only reports who will actually be managed by someone else have their reporting line change.