blob_redacted· reason_code· applies to state_resolutionBlob has been redacted (ak.redaction accepted) or hard-erased (ak.audit.erasure_receipt published) and is no longer fetchable. Both new presign requests and in-flight (not-yet-expired) presign URLs MUST be rejected with this code. See zh/crypto-media/media-and-blob.md §5.4.4.1.