Turkish Grilled Turkey or Chicken with Tangy Herbed Yogurt

Name: Turkish Grilled Turkey or Chicken with Tangy Herbed Yogurt
Ingredients: 1 9-pound whole turkey or chicken; 2 tablespoons Aleppo pepper flakes or Korean pepper flakes (gochugaru); 1 head garlic, peeled and mashed to a paste (about 3 tablespoons); 1 1/2 tablespoons kosher salt (Diamond crystal), plus more for seasoning; 1 teaspoon freshly ground pepper, plus more for seasoning; 1 tablespoon ground coriander; 1/2 cup plus 2 tablespoons extra-virgin olive oil; 2 lemons, halved; 2 cups whole milk Greek-style yogurt; 2 tablespoons chopped chives; 2 tablespoons chopped parsley; 2 teaspoons chopped oregano; Tabbouleh for serving