fix: ignore escaped commas in CSV checks (#832)
* fix file content checking bug
* skip counting commas in quotes for csv detection
* add test for comma count
* change file content grab to -1
* version and changelog
* add csv to extension check
* add file to tests
* ingest-test-fixtures-update
* Update ingest test fixtures (#833)
Co-authored-by: MthwRobinson <MthwRobinson@users.noreply.github.com>
* fix typo
* fix changelog wording
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Co-authored-by: MthwRobinson <MthwRobinson@users.noreply.github.com>
