TODO: Factor in blocked account status in API responses

[grctest]

If an asset/offer/account which is associated with a blocked scam account is requested from the BEET API, we should consider responding either with a blank response, an error, or inject a field indicating the object is associated with a blocked account.

This way we can either avoid showing blocked user content entirely, or the UI can warn the user that they're interacting with a suspicious blockchain account.