### Summary
To combine ingest and holistic metrics efforts, add the `doctype` field
to the results from the functions in evaluate.py for use in subsequent
aggregation functions.
### Test
Run `sh ./test_unstructured_ingest/evaluation-metrics.sh
text-extraction` and there will be a new doctype column with the file's
doctype extension.
<img width="508" alt="Screenshot 2023-11-01 at 2 23 11 PM"
src="https://github.com/Unstructured-IO/unstructured/assets/42684285/44583da9-e7ef-4142-be72-c2247b954bcf">
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Co-authored-by: ryannikolaidis <1208590+ryannikolaidis@users.noreply.github.com>
Co-authored-by: shreyanid <shreyanid@users.noreply.github.com>