BUG-pruning-branch-choice

[riccardobonanomi]

Describe the bug
With bifurcation of short branches, particularly towards the end of the planimetry, the pruning algorithm does not choose according to the criteria specified for the axis extraction and for high pruning iteration this can lead to the elimination of the wrong branch in the skeleton. This is generally only a problem towards the end of the image because generally the main river and eventual longer secondary branches are long enough that are not pruned by the algorithm, but the issue can arise with shorter branches

Expected behavior
The pruning algorithm should be able to choose between branches using the criteria specified for the axis extraction.