Cluster member drill-down

curl --request GET \
  --url https://api.example.com/api/dashboard/clusters/{cluster_id}/members \
  --header 'Authorization: Bearer <token>'

{
  "cluster": {
    "id": 123,
    "label": "<string>",
    "member_count": 123,
    "description": "<string>",
    "personal_count": 0,
    "work_count": 0,
    "last_activity": "2023-11-07T05:31:56Z"
  },
  "items": [
    {
      "id": 123,
      "topic": "<string>",
      "content": "<string>",
      "memory_type": "<string>",
      "similarity": 123,
      "created_at": "2023-11-07T05:31:56Z",
      "days_ago": 123,
      "project": "<string>",
      "scope": "<string>",
      "pinned": false,
      "excluded": false
    }
  ],
  "total": 123
}