Paella with Chorizo Shrimp Clams and Chicken with Garlic Aioli

Name: Paella with Chorizo, Shrimp, Clams and Chicken with Garlic Aioli
Ingredients: 2 quarts chicken stock; 1 large pinch saffron threads; Extra-virgin olive oil, for coating; 4 ounces Spanish or Mexican chorizo, diced; 2 boneless, skinless chicken thighs, diced into 1-inch pieces; 4 cloves garlic, smashed; 2 stalks celery, diced; 1 yellow onion, diced; 1 red bell pepper, seeded and diced; 1 tomato, diced; 1/2 cup fresh peas; 2 cups Bomba rice; 12 littleneck clams; 6 large shrimp, cleaned, head and tail left on, shells reserved; 2 tablespoons sherry vinegar; 2 large egg yolks; 1 cup canola oil; Kosher salt; 1 small bunch chives, sliced