avatar_blob_ref_invalid· code· HTTP 422· scope endpoint· applies to schema_validation, service_call`ak.self.account.command.update_profile.v1` received an `avatar_blob_ref` that is not a valid Arkret Blob reference, does not resolve under the caller's profile/avatar policy, or points to a blob the server cannot authorize for profile display. Protocol profile updates MUST use `avatar_blob_ref`; `avatar_url` is not a protocol field.