Asset source gets not transformed when using fragments

[jhmen]

Describe the bug
When you send a GraphQL Query with fragments on query level, the source attribute gets not transformed.

To Reproduce
Steps to reproduce the behavior:

1. Send this query to the shop api:

query TestQuery {
    ...TestFragment
    activeOrder {
        ...TestFragment2
    }
}

fragment TestFragment on Query {
    activeOrder {
        active
    }
}


fragment TestFragment2 on Order {
    lines {
        featuredAsset {
            source
        }
    }
}

3. The source is not transformed and is not a valid URL
4. Send the Query without the first fragment

query TestQuery {
    activeOrder {
        ...TestFragment2
    }
}

fragment TestFragment2 on Order {
    lines {
        featuredAsset {
            source
        }
    }
}

6. The source gets transformed
   A clear and concise description of what you expected to happen.

Environment:

• @vendure/core version: 3.1.1
• Nodejs version: 22
• Database (mysql/postgres etc): mariadb

Additional context
I have debugged the asset-interceptor-plugin.ts and found that the type argument in transformValues is undefined, when sending the first query.