Transformer strange behavior

Package version

2.3.1

Describe the bug

Controller:

return serialize(
  TagTransformer.paginate(tags.all(), tags.getMeta()).useVariant('toDashboardObject'),
)

When pick is used, here is the response:

export default class TagTransformer extends BaseTransformer<Tag> {
  toDashboardObject() {
    return this.pick(this.resource, ['id', 'slug', 'name', 'rated', 'archived'])
  }
}

{
    "data": [
        {
            "id": 1,
            "slug": "seinen",
            "name": "Seinen",
            "rated": "r_18",
            "archived": false
        },
        // Rest of the data
    ],
    "metadata": {
       // this part is OK
    }
}

When using omit:

export default class TagTransformer extends BaseTransformer<Tag> {
  toDashboardObject() {
    return this.omit(this.resource, ['description'])
  }
}

{
    "data": [
        {
            "modelOptions": {
                "connection": "mysql"
            },
            "fillInvoked": false,
            "cachedGetters": {},
            "forceUpdate": false,
            "$columns": [
                "archived",
                "createdAt",
                "description",
                "id",
                "name",
                "rated",
                "slug",
                "updatedAt"
            ],
            "$attributes": {
                "id": 1,
                "slug": "seinen",
                "name": "Seinen",
                "description": "",
                "rated": "r_18",
                "archived": false,
                "createdAt": "2026-04-08T16:07:22.000+02:00",
                "updatedAt": "2026-04-08T16:07:22.000+02:00"
            },
            "$original": {
                "id": 1,
                "slug": "seinen",
                "name": "Seinen",
                "description": "",
                "rated": "r_18",
                "archived": false,
                "createdAt": "2026-04-08T16:07:22.000+02:00",
                "updatedAt": "2026-04-08T16:07:22.000+02:00"
            },
            "$preloaded": {},
            "$extras": {},
            "$sideloaded": {},
            "$isPersisted": true,
            "$isDeleted": false,
            "$isLocal": false
        },
        // Rest of the data
    ],
    "metadata": {
       // this part is OK
    }
}

Reproduction repo

No response

Start with the BaseTransformer implementations of pick and omit, then trace the TagTransformer useVariant('toDashboardObject') call from the controller. Compare how each method serializes the resource; the fix is done when omit returns the model's intended attributes without exposing internal model state while pagination metadata remains intact.