Boil cranberry juice with wine and cinnamon stick over high heat until reduced to 1 cup, about 9 minutes. Meanwhile, puree berries in a blender. Strain and discard seeds. Remove cinnamon stick from reduced wine mixture. Stir in berry mixture. Pour into a bowl. Taste and add lemon juice and 1 to 2 tablespoons sugar, as needed. (Soup will taste less sweet when chilled.) Refrigerate at least until cold, about 3 hours or up to 2 days. Serve chilled with a swirl of cream in centre.