Bug: Fetch include in deep URL passes query validation, but is not applied

[bart-degreed]

Description

For example, the URL:

https://localhost:5001/api/users/123/orders?include=orders.country

returns all attributes of orders, but it does add an included section that contains the related country.

[maurei]

Just stumbled upon this myself too, will address this very soon

[maurei]

fixed in #634