Support Map type in log table (Arrow row format)

[platinumhamburg]

Search before asking

• I searched in the issues and found nothing similar.

Motivation

Add Map type support for log table scenarios to handle key-value structured data.

Solution

• Extend Arrow row format to support Map type serialization/deserialization
• Implement Map type encoding/decoding in client SDK
• Add validation for Map type in schema definitions
• Ensure end-to-end data flow works for Map type in log tables

Anything else?

No response

Willingness to contribute

• I'm willing to submit a PR!

[XuQianJin-Stars]

hi @platinumhamburg I want take it.