curl --request GET \
  --url http://localhost:8081/v1/routing/ab-tests/{id}/comparison \
  --header 'X-Org-Id: <x-org-id>' \
  --header 'X-Reevit-Key: <api-key>'

{
  "winning_variant": "<string>",
  "success_rate_diff": 123,
  "latency_diff": 123,
  "statistically_valid": true,
  "confidence_level": 123,
  "recommended_duration": 123
}