TAN-1794 - FormSync / XLSX - return async errors

[jamesspeake]

Errors now look like this - I've tweaked text to make it clearer. Second image shows errors we don't specifically catch - but don't expect these to happen often.

Could not get it to only throw errors for those ideas that have failed - this would be too big a refactor right now.

Changelog

Changed

• XLSX/PDF import now return the errors being thrown within the Async job to give a clearer picture when something goes wrong

[notion-workspace[bot]]

Better error messages from FormSync

[cl-dev-bot]

	Warnings
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	Messages
:book:	Changelog provided 🎉
:book:	Run the e2e tests
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Generated by :no_entry_sign: dangerJS against 199c924e142694db7900cdbd522a024265830ebd

[jamesspeake]

Maybe I would prefer if last_error_message returned a nice and clean string that can be immediately used by FE.

I've just updated this logic to the backend. There is now a method in the controller to return a generic 'uncaught_error' if it's not a recognised error string. Do you want to take a quick look @alexander-cit ?