Composition Error when Fed 1 subgraph redefines a built-in scalar

[tinnou]

Issue Description

Description

Redefining built-in scalar in Fed 1 subgraphs throws a validation error, it's happening in internals-js/validate.ts.

The following test:

it('repro redefined built-in scalar breaks @key directive', () => {
    const subgraphA = {
      typeDefs: gql`
        type Query {
          q: String
        }
        type A @key(fields: "k") {
          k: ID!
        }
        scalar Boolean
      `,
      name: 'subgraphA',
    };

    const result = composeServices([subgraphA,]);
    assertCompositionSuccess(result);
  });

throws

Error: `[subgraphA] Invalid default value (got: true) provided for argument @key(resolvable:) of type Boolean.

Link to Reproduction

1e48e2b

Reproduction Steps

I wrote a unit test in composeFed1Subgraphs.test.ts that reproduces the issue.