curl --request GET \
  --url https://api.getfernand.com/organization/rag/statistics \
  --header 'X-API-Key: <api-key>'

{
  "max_size": 10485760,
  "statistics": {
    "messages": {
      "count": 150,
      "size": 2048576
    },
    "articles": {
      "count": 25,
      "size": 1024000
    },
    "links": {
      "count": 10,
      "size": 512000
    },
    "questions": {
      "count": 40,
      "size": 204800
    },
    "texts": {
      "count": 15,
      "size": 307200
    },
    "files": {
      "count": 5,
      "size": 4096000
    }
  },
  "status": {
    "is_articles_processing": false,
    "is_messages_processing": false,
    "processing_urls": "https://example.com/page"
  }
}