消息丢失bug修复

Service/Charger/Codec/Decoder.cs

@@ -71,7 +71,6 @@ public class Decoder : ByteToMessageDecoder
                 ASDU asdu = Parse(buffer, totalFrameLength, delimiter, out data);
                 Log(chargerSn).Info($"receive {BitUtls.BytesToHexStr(data)}:{JsonConvert.SerializeObject(asdu)} from {chargerSn}");
                 output.Add(asdu);
-                buffer.Clear();
             }
             catch (Exception e)
             {