fix: make request_token and context optional based on skip parameters

[mehrad77]

As specified in the Protecting Out-of-Band Actions section of the Castle documentation, if we need to make requests to the Filter/Risk API from the server side, we can pass the skip_request_token_validation or skip_context_validation parameters to make request_token and context optional. However, this behavior is not currently reflected in the type definitions, so we have to use // @ts-expect-error in our codebase.

This merge request updates the models so that when any of these skip parameters are passed, the corresponding field becomes optional.