Give feedback if attempting to attach a non-Redactable object

[ssawchenko]

While integrating with a client project I forgot to extend my data classes with Redactable, this resulted in the Sentry report simply not being set. As it took me awhile to figure out this was the issue, we should look into (1) allowing non-Redactable objects to be attached (not sure if iOS allows this) or (2) log a separate error (console, maybe even non-fatal) to track that this case has occurred.