* base work to support attachments in create / update row
* handle single attachment column
* fix tests
* pro
* fix some types
* handle case where file exists in storage
* improve attacment processing
* refactor slightly and ensure correct url is used for existing attachments
* add test
* Fixing a build issue.
* update tests
* some lint
* remove cursed backend-core test util
* addressing pr comments
* refactoring nasty automationUtils upload code
* remove uneeded check
* use basneeame for fallback filename
* add a test to ensure coverage of single attachment column type
* fail early when fetching object metadata
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Co-authored-by: mike12345567 <me@michaeldrury.co.uk>
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