fix: 🐛 fix the optional types in OpenAPI
I made these changes by looking at how the Typescript types are created with https://github.com/oazapfts/oazapfts (that we use on the Hub).
fix: 🐛 fix the optional types in OpenAPI: I made these changes by looking at how the Typescript types are created with https://github.com/oazapfts/oazapfts (that we use on the Hub).