lance_append.rs

let lance_table = connection.open_table("table_name").execute().await?;
let batches = vec![Ok(RecordBatch::try_new(
    schema.clone(),
    vec![Arc::new(key_array), Arc::new(vectors_array)],
)?)
.map_err(|e| ArrowError::from_external_error(e.into()))];
let batch_iterator = RecordBatchIterator::new(batches, schema);
let boxed_batches = Box::new(batch_iterator);
lance_table.add(boxed_batches).execute().await?;