[kiitos]

I'd default to CategoryID being a string, with uniqueness constraints defined on the categories table. And UnitPrice to be a composite type, containing a [u]int amount and a string denomination, e.g. `10000 USD_CENT` or something like that.

But what you or I or anyone thinks is the right type for these or any columns, is totally beside the point. The point is that the type for a column isn't really assume-able by an LLM, at least not automatically.