wrap errors correctly

pkg/es/errors.go

@@ -17,13 +17,14 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
 package es
 
 import (
+	"errors"
 	"fmt"
 	"strings"
 
 	"github.com/elastic/go-elasticsearch/v9/typedapi/types"
 )
 
-func esErrorString(err error) string {
+func esErrorString(err error) error {
 	msg := err.Error()
 
 	switch e := err.(type) {
@@ -42,5 +43,5 @@ func esErrorString(err error) string {
 
 	}
 
-	return msg
+	return errors.New(msg)
 }