Function push_training_observation 

pub fn push_training_observation(
    context: TrainingHandle,
    id: u64,
    episode_state: u32,
    reward: f32,
    features: &[f32],
    actions: &[f32],
    metadata: &[Metric],
) -> FFIResult<()>

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

The actions parameter should only be set for augmented observations and demonstration observations.

See submit_training_observations, submit_training_augmented_observations and submit_training_demonstration_observations.