get https://api.toqua.ai/performance//main-engine/sfoc-vs-load
Fetches main engine SFOC vs Load data (sensor, noon report, and shop test).
- x: Load (fraction of MCR, range 0–1)
- y: SFOC (g/kWh)
- should_normalize: If True, SFOC values are adjusted to standard reference conditions using the prediction service.
Returns: GetMainEngineSFOCvsLoadResponse