Sift the flour, sugar, baking powder, baking soda, and salt into a large mixing bowl. In a separate large bowl, lightly whisk the eggs. Add the milk, sour cream, melted butter, and vanilla, whisking to blend. Make a well in the dry ingredients and pour the egg mixture into it. Whisk the ingredients together just until blended. Fold the lemon zest and blueberries into the batter.