Migrate Hot Chocolate from 16.7 to 16.8

Update every HotChocolate.* package in the application to version 16.8 before applying these changes.

Behavioral breaking changes#

Fields added by type interceptors get the default resolver cost#

A field that a type interceptor adds gets the default resolver cost of 10 when it has no pure resolver, whatever the order in which the cost analyzer and the interceptor are registered. In 16.7, when the cost analyzer was registered first, which AddGraphQLServer() does, such a field had no @cost directive and was priced like a field without a resolver.

These fields now have a field cost of 10 per selection, where 16.7 charged 1 for a field that returns an object, interface, or union type, and 0 otherwise:

• _entities, which AddApolloFederation() adds to the query type.
• query, which AddQueryFieldToMutationPayloads() adds to mutation payload types.
• Fields with a resolver that an application's own TypeInterceptor adds.

An operation whose field cost was close to MaxFieldCost can now exceed it and be rejected with the error code HC0047. Raise MaxFieldCost if such operations must still run. To keep a lower cost for a field that your own interceptor adds, give the field an explicit @cost directive, which the cost analyzer does not replace.