recording_unavailable
No safely playable recording exists for this call - the consent basis in force did not permit one, its retention window has closed, or its retained artifact is temporarily unavailable. Nothing was lost, and the code says so rather than leaving a generic 404 to read as a missing artifact (07-compliance.md).
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_unavailable",
"title": "…",
"status": 404,
"detail": "…",
"instance": "/v1/…"
}