It would make sense to be able to set original_name when creating a new transaction (https://lunchmoney.dev/#insert-transactions). It would allow a developer to import transactions and include the original_name without needing to use the CSV import tool that does support setting original_name.

I think there's value in original_name not being editable after the transaction has been created, giving us the ability to always reference the original transaction name no matter what changes we make.