[I] [Improve][DataProxy] Adjust the message body check logic for MsgType=5 [inlong]

[via GitHub]

gosonzhang opened a new issue, #11384:
URL: https://github.com/apache/inlong/issues/11384

   ### Description
   
   The current implementation should give a clear error code when the fields of 
MsgType=5 message body are filled incorrectly[1], so that users can quickly 
handle such exceptions
   
   
![image](https://github.com/user-attachments/assets/5905d6f3-85cf-4a90-af54-c5c8a7b4ed23)
   
   1. 
https://github.com/apache/inlong/blob/master/inlong-dataproxy/dataproxy-source/src/main/java/org/apache/inlong/dataproxy/source/v0msg/CodecTextMsg.java#L123
   
   ### InLong Component
   
   InLong DataProxy
   
   ### Are you willing to submit PR?
   
   - [X] Yes, I am willing to submit a PR!
   
   ### Code of Conduct
   
   - [X] I agree to follow this project's [Code of 
Conduct](https://www.apache.org/foundation/policies/conduct)
   


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