rlmesh_recorder_export
export returns owned UTF-8 path bytes. Refused targets and I/O fail with ERR_OS. After close, exporting removed staged media fails ERR_RUNTIME; exporting metrics without staged media still works.
RLMeshStatus rlmesh_recorder_export(
const RLMeshRecorder* recorder,
const char* path,
const RLMeshRecorderExportOptions* options,
RLMeshBytes* out_path
)