fn new() -> Self

fn start_session(
        &mut self,
        budget_tokens: usize,
        budget_time: Option<f64>,
        complexity: f64,
    ) -> usize

fn end_session(&mut self, session_idx: usize, tokens_used: usize, time_seconds: f64) -> ()

fn session_count(&self) -> usize

fn average_tokens_per_session(&self) -> f64

fn average_time_per_session(&self) -> f64

fn average_utilization(&self) -> f64

fn over_budget_count(&self) -> usize

fn get_summary(&self) -> HashMap<String, serde_json::Value>

fn clear(&mut self) -> ()