Function run_online 

pub fn run_online(
    window: u32,
    c: f64,
    noise_amp: f64,
    seed: u64,
) -> OnlineReport

Runs the online UCB tuner over the drift problem and reports its behaviour.

window is the sliding-window length and c the UCB exploration constant.

Panics

If the tuner configuration is invalid (it is not — window ≥ 1, finite arms).