NN ensemble may return scores above 1.0

[osma]

The NN ensemble doesn't always return scores in the range 0.0-1.0.

For example, the yso-sv model currently available in Finto AI returns this for the input text historia:

{
  "results": [
    {
      "label": "historia",
      "notation": null,
      "score": 1.3140300512313843,
      "uri": "http://www.yso.fi/onto/yso/p1780"
    },
    [...]
}

This should be avoided, for example by capping the scores to 1.0.