l telemetry, we both apply it and mark traffic.
    socket.on("telemetry_status", (data) => {
      const gauges = data?.gauges || data?.status?.gauges || null;
      if (gauges) {
        if (gauges.roll_deg){
          if (gauges.roll_deg !== telem_roll){
            markTelemetrySeen();
            telem_roll = gauges.roll_deg;
            applyG(gauges);
          }
        }
      }
      // REMOVE this older optimistic reflection:
      // if (typeof data?.status === "string" && data.status.toLowerCas