recording_url_signing_unavailable
The recording exists and is retained, but object-storage URL signing is not wired in this deployment, so the 302 cannot be issued. Export the call instead.
Problem shape
Every non-2xx response is an RFC 9457 application/problem+json body. The type URI below is stable and machine-matchable, so branch on the final path segment (the code) and treat the status as redundant confirmation. See the error-handling guide.
{
"type": "https://docs.vocapable.com/errors/recording_url_signing_unavailable",
"title": "…",
"status": 501,
"detail": "…",
"instance": "/v1/…"
}