[update] add year_str scop contribution for pivot

models/scop_contribution.py

@@ -20,6 +20,7 @@ class ScopContributions(models.Model):
         string="Type de cotisation",
         ondelete='restrict', index=True)
     year = fields.Integer("Année", index=True)
+    year_str = fields.Char("Année (txt)",)
     calculation_date = fields.Datetime("Date calcul cotisation")
     loss = fields.Boolean("Perte")
     amount_calculated = fields.Integer("Montant calculé")