iterator interface chenged index and count members from int to tint 64

kern/iterator.go

@@ -30,8 +30,8 @@ type Iterator interface {
 	fmt.Stringer
 	Next() (item any, err error) // must return io.EOF after the last item
 	Current() (item any, err error)
-	Index() int
-	Count() int
+	Index() int64
+	Count() int64
 	HasOperation(name string) bool
 	CallOperation(name string, args map[string]any) (value any, err error)
 }