Floor sub-ms phase timings at 1 instead of 0

@@ -65,6 +65,22 @@ fn tls_config_h2() -> Arc<rustls::ClientConfig> {    Arc::new(cfg)}/// Round a duration to whole milliseconds, but report a sub-ms phase as/// 1 rather than 0. The Linux kernel routes traffic destined for the/// host's own public IP via `lo`, so loopback TCP/handshake phases/// genuinely take 200-500 microseconds, which `as_millis()` truncates to/// zero. A `0` in the chart reads as "this phase didn't happen" rather/// than "this phase was instant", so floor it at 1 ms when the phase did/// run. Total is unaffected: any real probe takes well over 1 ms.fn elapsed_ms_atleast1(d: std::time::Duration) -> i64 {    let ms = d.as_millis() as i64;    if ms > 0 || d.is_zero() {        ms    } else {        1    }}fn looks_like_ssl_error(e: &anyhow::Error) -> bool {    let s = format!("{e:?}").to_lowercase();    s.contains("certificate")

@@ -187,13 +203,13 @@ async fn phased_hop(url: &Url) -> anyhow::Result<HopResult> {        .iter()        .next()        .ok_or_else(|| anyhow!("no addresses for {host}"))?;    let dns_ms = dns_start.elapsed().as_millis() as i64;    let dns_ms = elapsed_ms_atleast1(dns_start.elapsed());    let addr = SocketAddr::new(ip, port);    let tcp_start = Instant::now();    let tcp = TcpStream::connect(addr).await.context("tcp connect")?;    tcp.set_nodelay(true).ok();    let tcp_ms = tcp_start.elapsed().as_millis() as i64;    let tcp_ms = elapsed_ms_atleast1(tcp_start.elapsed());    if !is_https {        // h2 over plain TCP (h2c with prior knowledge) is rare in the

@@ -210,7 +226,7 @@ async fn phased_hop(url: &Url) -> anyhow::Result<HopResult> {        .connect(server_name, tcp)        .await        .context("tls handshake")?;    let tls_ms = tls_start.elapsed().as_millis() as i64;    let tls_ms = elapsed_ms_atleast1(tls_start.elapsed());    let (status, headers, raw_headers_json, ttfb_ms) =        h2_request(tls_stream, &host, &path_q).await?;

@@ -263,7 +279,7 @@ async fn h2_request(        .context("h2 request build")?;    let (rsp_fut, _send_stream) = sr.send_request(req, true).context("h2 send_request")?;    let rsp = rsp_fut.await.context("h2 response")?;    let ttfb_ms = ttfb_start.elapsed().as_millis() as i64;    let ttfb_ms = elapsed_ms_atleast1(ttfb_start.elapsed());    let status = rsp.status().as_u16() as i64;    let mut headers = BTreeMap::new();