For Nutri-Score computation, give priority to the fruits and vegetables percent estimate from ingredients over category

[stephanegigandet]

Describe the bug

When we first implemented the Nutri-Score, we didn't have ingredients analysis, so we used the product category to get an estimate of the % of fruits and vegetables for some products (e.g. fruit juices, jams).

We now also compute an estimated % of fruits/vegetables from the list of ingredients.

In some cases, the categories are not accurate (e.g. "fruit juice" when the product is a fruit nectar with water), which causes the % of fruits / vegetables to be overestimated.

We probably should reverse the priority: if we have a fruit % from ingredients, use that, and use the category as a last resort.

To Reproduce

currently on the producers platform for lea nature:

https://fr.pro.openfoodfacts.org/produit/3289196100467/nectar-de-poire-biologique-jardin-bio

(nectar listed in fruit juices)

Expected behavior

More precise Nutri-Score computation.

Screenshots

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Additional context

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Type of device

Other

Browser version

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Number of products impacted

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Time per product

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