Add class schamas to the existing calls where appropriate

[michaelwiles]

So I'd like us to avoid using dicts as input.

The structure of the data that we received must be made explicit in our code base and hopefully, since fastapi and pydantic play nicely together this will be a simple process.

As dev stands now the multi teannt subwallet calls need these schema classes added. It's not a lot of work. These classes will just be added to the existing wallet module in multi_tenant.