Error Infering Schema for LogicalType::UNKNOWN

[tustvold]

Describe the bug

Currently in the abscence of an arrow schema, LogicalType::UNKNOWN results in the following error message

Unable to convert parquet INT32 logical type Some(UNKNOWN(NullType)) or converted type NONE

To Reproduce

Create a parquet file with a null array and strip out the arrow schema.

Expected behavior

As per the docs this should be inferred as the null type