Bohemian Orange Chicken

Name: Bohemian Orange Chicken
Ingredients: 8 (5 ounce) bone-in, skin-on chicken thighs; 2 teaspoons kosher salt; 1 tablespoon olive oil; 0.5 cup diced onion; 1 pinch kosher salt; 1 tablespoon white sugar; 2 cloves garlic, minced; 1 medium orange, zested; 0.667 cup freshly squeezed orange juice; 2 tablespoons freshly squeezed lemon juice; 2 cups chicken broth; 1 pinch ground cinnamon; 1 pinch cayenne pepper; 0.125 teaspoon freshly ground black pepper; 1 tablespoon caraway seeds; 1 splash water, or as needed; 1 teaspoon grated orange zest