Build the request-level summary (no target) for the fan-out outer meta and for an empty selection where no per-target inner envelope exists. Mirrors the summary buildApiErrorEnvelope assembles from a bare request.
buildApiErrorEnvelope
Build the request-level summary (no target) for the fan-out outer meta and for an empty selection where no per-target inner envelope exists. Mirrors the summary
buildApiErrorEnvelopeassembles from a bare request.