docs: public boolean isSampled(String hexTraceId, boolean debug) {
      if (Boolean.TRUE.equals(debug)) return true;
      long traceId = HexCodec.lowerHexToUnsignedLong(hexTraceId);
      // The absolute value of Long.MIN_VALUE is larger than a long, so Math.abs returns identity.
      // This converts to MAX_VALUE to avoid always dropping when traceId == Long.MIN_VALUE
      long t = traceId == Long.MIN_VALUE ? Long.MAX_VALUE : Math.abs(traceId);
      return t <= boundary();
    }