Function persist::indexed::columnar::arrow::encode_trace_arrow

pub fn encode_trace_arrow<W: Write>(
    w: &mut W, 
    batch: &BlobTraceBatch
) -> Result<(), Error>

Encodes an BlobTraceBatch into the Arrow file format.

NB: This is currently unused, but it’s here because we may want to use it for the local cache and so we can easily compare arrow vs parquet.