chore: handle more duplicate insert errors

[shreddedbacon]

Checklist

• Affected Issues have been mentioned in the Closing issues section
• Documentation has been written/updated
• PR title is ready for inclusion in changelog

One idea for handling duplicate inserts. There are probably other places this needs to be done.

It could probably be done better with transactions or try/catch?

Happy if anyone else wants to take this on though, just planting this as a seed

[tobybellwood]

@CGoodwin90 to resuscitate, rebase and update

[tobybellwood]

Happy to move forwards with these - given the clear scoping. Will post a clear message in the release notes that errors are now actually errors. Will go through all internal tools to ensure they work as expected