Salmon Rillettes

Name: Salmon Rillettes
Ingredients: 1/2 pound center-cut, skinless salmon fillet; 1 tablespoon anise-flavored liqueur, such as Pernod; Kosher s alt; Freshly ground white pepper; 1 celery rib; 1 leek, halved lengthwise; 1 small onion, quartered lengthwise; 1 bay leaf; 1 teaspoon black peppercorns; 1 cup dry white wine; 4 cups water; 5 tablespoons unsalted butter, softened, divided; 1 large shallot, minced (1/4 cup); 1/2 tablespoon sour cream; 1/4 pound skinless hot-smoked salmon, flaked; 2 tablespoons snipped chives; 1 1/2 tablespoons fresh lemon juice; 1 tablespoon extra-virgin olive oil; 1/4 teaspoon smoked sweet paprika; Toasted baguette slices, for serving