fix: Add serie field to SetResume in setToSetSimple function

[lamplis]

Problem

The GraphQL API was failing with the error:

Cannot return null for non-nullable field Set.serie

This was happening because the setToSetSimple function in server/compiler/utils/setUtil.ts was not including the serie field in the returned SetResume object.

The GraphQL schema defines Set.serie as non-nullable (serie: Serie!), but cards were being compiled with set objects that had no serie field, causing GraphQL queries to fail.

Solution

Added the serie field to the SetResume object returned by setToSetSimple:

serie: {
    id: set.serie.id,
    name: resolveText(set.serie.name, lang)
}

This matches the structure used in setToSetSingle and ensures all card objects have the required serie reference in their set objects.

Testing

• ✅ TypeScript validation passes
• ✅ Server compilation succeeds
• ✅ All cards now have set.serie field populated
• ✅ GraphQL queries should no longer fail with null serie errors

Related Issues

This fixes the test failures in PR #1049 and any other PRs that were encountering the "Cannot return null for non-nullable field Set.serie" error.

[Aviortheking]

Hi, before posting a PR with a change that will reflect in both the GraphQL & the REST API, can you please first create an issue depicting the problem.