Fix polygon confidence score

Polygon confidence score should not be divided by max_value in get_polygon(). As it is already in [0, 1], dividing by max_value could yield confidence scores with values > 1

assigned to @starride

created branch fix-polygon-confidence-score to address this issue

mentioned in merge request !99 (merged)

changed milestone to %ML Prod - April 2023 n°1

added P1 label

closed