curl --request GET \
  --url https://api.hyperspell.com/context-documents/staleness \
  --header 'Authorization: Bearer <token>'

{
  "last_generated_at": "2023-11-07T05:31:56Z",
  "resources_since": 123,
  "sources_with_changes": [
    "<string>"
  ],
  "staleness_level": "<string>"
}