Skills for challenge not returning full data

[jmgasper]

The challenge API v6 isn't returning full linked skills.

Challenge ID: 31b4b510-0b0a-42a8-a1b2-dec8e026ccc2

Skills are associated with that challenge in the database, but they don't contain the full information that the v5 API does, which it retrieves from the standardized skills API:

https://github.com/topcoder-platform/challenge-api/blob/940ef7b4699062aaf22ca9a82fd1b4e9895a1ebf/src/common/helper.js#L1141-L1142

Current:

    "skills": [
        {
            "id": "7f26d1d1-7bf8-48f4-8a26-2bd1cd02c82d"
        }
    ],

Expected:

    "skills": [
        {
            "name": "Behavior-Driven Development (BDD)",
            "id": "7f26d1d1-7bf8-48f4-8a26-2bd1cd02c82d",
            "category": {
                "name": "Programming and Development",
                "id": "481b5ebc-2fe6-45ed-a90c-736936d458d7"
            }
        }
    ],