Implement depth-limit to GraphQL Queries/Mutation operations For Non-Hosted Scenario

[abhishekkumams]

Why make this change?

• Closes Add support for defining a limit in how nested queries can be #1577
  • This PR allows to limit query/mutation nested depth.
  • Any query/mutation with nested depth more than the specified maximum allowed depth limit will fail.
  • This will help in blocking potential queries that may be targeted to slow down our servers.

What is this change?

• Using .AddMaxExecutionDepthRule provided by Hot Chocolate.
• Added in the StartUp, will be setup during the startup.
• Updated dab.draft.schema.json file to allow both integer and null value for depth-limit.
• NOTE: Currently this feature is only for Non-Hosted Scenario.
• Introspection Queries are not impacted.

How was this tested?

• Integration Tests

Sample Request(s)

#nested depth: 8

{
    books(filter: {id: {eq: 1}}){
        items{
            id
            title
            publishers {
                id
                name
                books (filter: {authors: {id: {isNull: false}}}){
                    items {
                        authors{
                            items{
                                id
                                name
                            }
                        }
                    }
                }
            }
        }
    }
}

nested depth: 3

{
    book_by_pk(id: 2){
        id
        publishers {
            id
            name
        }
    }
}

Mutation (nested depth: 7)

mutation {
    createbook(item: {title: "My New Book", publisher_id: 1234}) {
        id
        title
        publishers {
            id
            name
            books (filter: {authors: {id: {isNull: false}}}){
                items {
                    authors{
                        items{
                            id
                            name
                        }
                    }
                }
            }
        }
    }
}

[abhishekkumams]

/azp run

[abhishekkumams]

/azp run

[seantleonard]

some test structure changes requested and more comments needed.

[seantleonard]

some additional suggestions/nits based on latest changes.

[abhishekkumams]

/azp run

[seantleonard]

few nits. Looks good! thank you for making these features additions and testing.

[abhishekkumams]

/azp run

[abhishekkumams]

/azp run

[abhishekkumams]

/azp run

[aaronburtle]

Looks good!

[abhishekkumams]

/azp run