rlmesh_adapter_history_windows_get
Borrowed UTF-8, copied before another slot runs; NULL slot uses the base text.
RLMeshStatus rlmesh_adapter_history_windows_get(
const RLMeshAdapter* adapter,
size_t i,
RLMeshStr* out_placement,
uint64_t* out_span,
uint64_t* out_frame_bytes
)