Resume an approval-paused run with approve/deny; streams the continuation over SSE.
Streams text/event-stream. The success body is a sequence of events rather than a
JSON document, which is why no 2xx schema is listed below — see Streaming for the event contract.
**Scoped to the calling API-key client:** only a run this client started is reachable — any of its keys, rotations included. Another client's run in the same tenant, a run started before clients were recorded, and another tenant's run are all the same 404 as an unknown id. A team run's assignment approval is a 404 here too: a team run is never started by a client, and its approvals are decided in the Console only.