This holds the name of the suppression policy an admin configured this task to apply, i.e. which set of fault-suppression rules should be active during this task's window. For a suppression task, this is the field linking a scheduled maintenance window to a specific, reusable policy of suppressed cause/type combinations, rather than the task defining its own ad hoc suppression rules. For example, setting suppressPolicyName to 'san-maintenance' means every cause/type item defined under that policy gets silenced for the duration of this task's window, and nothing else.