rlmesh_session_reset
A Session borrows its model/server until free. Local envs/factories stay exclusively leased until free; close never closes the model.
RLMeshStatus rlmesh_session_reset(
RLMeshSession* session,
const int64_t* seed,
const int64_t* trial_index,
RLMeshValue** out_observation,
RLMeshValue** out_info
)