Per-document retrieval / citation / implication counts with failure rate

curl --request GET \
  --url https://api-sandbox.featherhq.com/v1/knowledge-gaps/documents/health \
  --header 'x-api-key: <api-key>'

{
  "items": [
    {
      "doc_id": "<string>",
      "retrieved_count": 123,
      "retrieved_session_count": 123,
      "failed_session_count": 123,
      "failure_rate": 123,
      "cited_count": 123,
      "implicated_count": 123,
      "retrieval_gap_count": 123,
      "incomplete_knowledge_count": 123,
      "outdated_knowledge_count": 123,
      "title": "<string>",
      "url": "<string>"
    }
  ]
}