curl --request GET \
  --url https://api.example.com/v1/knowledge-base/{document_id}

{
  "id": "<string>",
  "name": "<string>",
  "type": "<string>",
  "metadata": {
    "created_at_unix_secs": 123,
    "last_updated_at_unix_secs": 123,
    "size_bytes": 123
  },
  "extracted_inner_html": "<string>",
  "url": "<string>",
  "dependent_agents": []
}