Support for Snapshot Retention Deferred Update

This deferred update allows you to add a retention policy with a retention hold to a manual or automatic snapshot of a filesystem, LUN, or project to prevent snapshot deletion. Setting and releasing these retention holds requires specific role authorizations.

A retention hold for a manual snapshot, which is especially beneficial for legal holds, has no specified duration, and the snapshot cannot be deleted until the off option is manually set by an authorized user.

A retention hold for an automatic snapshot, or scheduled snapshot, is especially advantageous for meeting data governance needs, such as for internal retention and regulatory compliance requirements. A snapshot cannot be manually deleted until the "retention hold" value has been exceeded.