Function push_inference_observation_with_metadata 

pub fn push_inference_observation_with_metadata(
    context: InferenceHandle,
    id: u64,
    episode_state: EpisodeState,
    reward: f32,
    features: &[f32],
    metadata: &[Metric],
) -> FFIResult<()>

Pushes an observation with metadata into a queue to be used later.