Create endpoint to get polices that should be accepted

[rosalieper]

Bug: T429591

[deer-wmde]

Currently the data the endpoint returns looks something like this:

{
  "data": [
    {
      "id": 1,
      "policy_type": "hosting-policy",
      "active_from": "2026-07-01T00:00:00.000000Z",
      "content_vue_file": "hosting-policy/version-1.vue",
      "created_at": "2026-07-15T10:23:56.000000Z",
      "updated_at": "2026-07-15T10:23:56.000000Z"
    }
  ]
}

I really like that you use this PoliciesCollection class, as that allows us to map this data in a single place to the shape we want/need. Here would be an example to map it more like the ticket specifies:

    public function toArray(Request $request): Collection {
        return $this->collection->map(function ($policy) {
            return [
              'policy_id' => $policy->id,
              'type' => $policy->policy_type,
              'content_vue_file' => $policy->content_vue_file,
              'active_from' => Carbon::parse($policy->active_from)->format('Y-m-d'),
            ];
        });
    }

would give us:

{
  "data": [
    {
      "policy_id": 1,
      "type": "hosting-policy",
      "content_vue_file": "hosting-policy/version-1.vue",
      "active_from": "2026-07-01"
    }
  ]
}

I also suggest adding tests for this shape in the unit tests. As far as I can see this data shape topic is the only missing bit now, we're almost there ❇️

[dati18]

LGTM now.