feat: change email, export my data, delete account (with data anonymization)

test/activity_retention_size_test.go

@@ -621,3 +621,5 @@ func mustMarshalChanges(t *testing.T, event audit.Event) []byte {
 	}
 	return encoded
 }
+
+func (f *sizedEventsFake) AnonymiseUser(uint32, *uint32, string) error { return nil }