DestatisLaneBusyDetail(DestatisLaneBusyDetail)
This instance's GENESIS lane is already in use.Split out of UpstreamErrorDetail for the same reason as
UpstreamDeferredDetail: only Destatis has a one-call-at-a-time
credential with a process-local queue in front of it. Naming lane_busy
on the shared model would advertise a state every typed family might
return, and none of the others have a path to it. Vendor Code 6 stays
upstream_unreachable (503); this is OUR queue, so it is 429.
{
"error": "lane_busy",
"source": "abs",
"upstream_status": 0,
"retry_hint": "string"
}