[Java] Add support for ExtensionVector in JsonFileWriter/JsonFileReader
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- Dominant language
- Java
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- Avg merge
- 3d 16h
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- 11
Description
### Describe the enhancement requested
Extension vectors are unsupported in JsonFileWriter/JsonFileReader. We use these classes to test our Arrow support, but when we try to round-trip data with (e.g.) UUIDs it fails.
### Component(s)
Java
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