Masked email: x:MaskedEmail/changes and a state in /get (fork additions)

The fork's per-account change log answers /changes, collapsing a mask
created and destroyed in the window. /changes on a registry type needs that
type's get permission.

crates/jmap/src/api/auth.rs

@@ -247,8 +247,9 @@ impl JmapAuthorization for AccessToken {
                 | MethodObject::PushSubscription
                 | MethodObject::SearchSnippet
                 | MethodObject::VacationResponse
-                | MethodObject::SieveScript
-                | MethodObject::Registry(_) => Permission::JmapEmailChanges,
+                | MethodObject::SieveScript => Permission::JmapEmailChanges,
+                // inbuxa: x:MaskedEmail/changes reads what /get reads
+                MethodObject::Registry(object_type) => object_type.get_permission(),
             },
             RequestMethod::Copy(m) => match &m {
                 CopyRequestMethod::Email(_) => Permission::JmapEmailCopy,