curl -X PUT https://api.rapidcall.ai/api/kb/docs/doc_003 \
  -H "Authorization: Bearer YOUR_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "Updated Return Policy",
    "content": "Our updated return policy allows returns within 60 days..."
  }'

{
  "document": {
    "id": "doc_003",
    "name": "Updated Return Policy",
    "type": "text",
    "characterCount": 3100,
    "updatedAt": "2026-04-02T13:00:00Z"
  }
}