Deprecated arguments are omitted in schema introspection

[mleweren]

Describe the bug

Deprecated arguments are omitted in schema introspection.

To Reproduce

Steps to reproduce the behavior:

1. Setup router with schema introspection enabled and the following supergraph:

schema
  @link(url: "https://specs.apollo.dev/link/v1.0")
  @link(url: "https://specs.apollo.dev/join/v0.3", for: EXECUTION)
{
  query: Query
}

directive @join__enumValue(graph: join__Graph!) repeatable on ENUM_VALUE

directive @join__field(graph: join__Graph, requires: join__FieldSet, provides: join__FieldSet, type: String, external: Boolean, override: String, usedOverridden: Boolean) repeatable on FIELD_DEFINITION | INPUT_FIELD_DEFINITION

directive @join__graph(name: String!, url: String!) on ENUM_VALUE

directive @join__implements(graph: join__Graph!, interface: String!) repeatable on OBJECT | INTERFACE

directive @join__type(graph: join__Graph!, key: join__FieldSet, extension: Boolean! = false, resolvable: Boolean! = true, isInterfaceObject: Boolean! = false) repeatable on OBJECT | INTERFACE | UNION | ENUM | INPUT_OBJECT | SCALAR

directive @join__unionMember(graph: join__Graph!, member: String!) repeatable on UNION

directive @link(url: String, as: String, for: link__Purpose, import: [link__Import]) repeatable on SCHEMA

scalar join__FieldSet

enum join__Graph {
  TEST @join__graph(name: "test", url: "http://example.org/graphql")
}

scalar link__Import

enum link__Purpose {
  """
  `SECURITY` features provide metadata necessary to securely resolve fields.
  """
  SECURITY

  """
  `EXECUTION` features provide metadata necessary for operation execution.
  """
  EXECUTION
}

type Query
  @join__type(graph: TEST)
{
  test(foo: Int @deprecated): Int
}

2. Submit introspection request

query {
  __type(name: "Query") {
    name
    fields {
      name
      args {
        name
      }
    }
  }
}

3. See that no arguments are returned in the response

{
  "data": {
    "__type": {
      "name": "Query",
      "fields": [
        {
          "name": "test",
          "args": []
        }
      ]
    }
  }
}

Expected behavior

The argument should be returned, e.g.

{
  "data": {
    "__type": {
      "name": "Query",
      "fields": [
        {
          "name": "test",
          "args": [
            {
              "name": "foo"
            }
          ]
        }
      ]
    }
  }
}

(please complete the following information):

• Version 2.2.0