Food Price Prediction API

POST to /predict with JSON:

{
      "instances": [
        {"date": "2024-01-15", "exchange_rate": 3805.03, "commodity_id": 51},
        {"date": "2024-02-15", "exchange_rate": 3873.59, "commodity_id": 52}
      ]
    }

Prophet is used only for commodity_id = 51 (Maize).
Ensemble averages RF + XGB (+ Prophet if maize).
Returns predictions from Random Forest, XGBoost, Prophet (if maize), and Ensemble.