rlmesh_remote_vector_env_new
Env construction connects; Model construction only validates. Remote I/O is exclusive, while immutable accessors/cancellation may overlap any call. Accessor pointers remain borrowed until free, including after close.
RLMeshStatus rlmesh_remote_vector_env_new(
const RLMeshRemoteEnvOptions* options,
RLMeshRemoteVectorEnv** out
)