Avoid duplicates in tags fields

[alexgarel]

In https://de-en.openfoodfacts.org/product/4008577006186/br%C3%B6tchen-conditorei-coppenrath-wiese-unsere-goldst%C3%BCcke-dinkelbr%C3%B6tchen-6-st%C3%BCck?rev=118 we have a repetition of the brand. This is due to a mobile app.

I think we shall resolve those issues in Product Opener code, at the moment we fill _tags fields.

[benbenben2]

Is it only for brands?

For duplicates in Brands, we may have around 200 products.

Sometimes, all variations of a brand can be listed (for example, kelloggs, kellogs, kellog's, kelogs, kelog's, etc.). This kind of duplicates could be solved with a taxonomy for Brands. But this is a bit off-topic.

[alexgarel]

@benbenben2 it's potentially for all "tags" fields.

[github-actions[bot]]

This issue has been open 90 days with no activity. Can you give it a little love by linking it to a parent issue, adding relevant labels and projets, creating a mockup if applicable, adding code pointers from https://github.com/openfoodfacts/openfoodfacts-server/blob/main/.github/labeler.yml, giving it a priority, editing the original issue to have a more comprehensive description… Thank you very much for your contribution to 🍊 Open Food Facts