This is the configured length of time, in seconds, that cleared fault/event records are retained before being permanently deleted under this policy. This retention setting directly determines how far back an admin can look when investigating a resolved issue, since once this interval passes since a fault cleared, its record is gone regardless of how significant the original problem was. A retentionInterval of 604800 (one week) means a fault that cleared eight days ago would already be permanently purged and unavailable for a delayed post-mortem review.