Yellow Squash Soup

Name: Yellow Squash Soup
Ingredients: 2 tablespoons extra-virgin olive oil; 1 cup chopped yellow onion; ½ cup chopped celery; 2 cloves garlic, finely chopped; 1 teaspoon ground cumin; 1 teaspoon ground turmeric; ½ teaspoon ground coriander; ¼ teaspoon smoked paprika, plus more for garnish; 6 cups chopped yellow squash (about 4 medium); 4 cups low-sodium vegetable broth; 2 cups chopped peeled Yukon Gold potatoes (about 2 medium); ½ teaspoon salt, divided; ¼ cup half-and-half plus 2 tablespoons, divided; ¼ cup whole-milk plain Greek yogurt; Chopped fresh chives for garnish