Baked White Fish Dip

Name: Baked White Fish Dip
Ingredients: 2 tablespoons extra-virgin olive oil; 2 pounds skinless cod fillets, about 1 inch thick; 2 tablespoons fresh lemon juice, plus 2 tablespoons finely grated lemon zest; Kosher salt; Pepper; 7 tablespoons unsalted butter; 1 cup plain dry breadcrumbs; 1/4 cup freshly grated Parmigiano-Reggiano cheese; 1/4 cup chopped parsley; 2 tablespoons chopped chives; 2 teaspoons smoked sea salt (optional); 1/4 teaspoon crushed red pepper; 2 1/2 tablespoons all-purpose flour; 1 cup heavy cream; 3 ounces Gruyère cheese, shredded (scant 1 cup); 4 ounces cream cheese, softened; Pinch of smoked paprika; 10 ounces frozen artichoke heart quarters, thawed and patted dry; Crudités or potato chips, for serving