Handle watchlist ID test cleanup errors

internal/db/watchlist_ids_test.go

@@ -14,7 +14,11 @@ func TestGetUserWatchlistAnimeIDsFiltersRequestedIDs(t *testing.T) {
 	if err != nil {
 		t.Fatalf("open sqlite: %v", err)
 	}
-	defer func() { _ = sqlDB.Close() }()
+	defer func() {
+		if err := sqlDB.Close(); err != nil {
+			t.Errorf("close sqlite: %v", err)
+		}
+	}()
 
 	_, err = sqlDB.ExecContext(context.Background(), `
 		CREATE TABLE watch_list_entry (