Function metrics

packages/server/src/api/routes.rs:1030–1039

(State(state): State<AppState>)

}

async fn metrics(State(state): State<AppState>) -> Json<Value> {
    let mut snapshot = json_value!(state.metrics.snapshot());
    if let Some(object) = snapshot.as_object_mut() {
        object.insert(
            "encoders".to_owned(),
            json_value!(state.registry.encoder_snapshots()),
        );
    }
    json(snapshot)
}

async fn webkit_targets(
    Path(udid): Path<String>,