fix doc add id creation, use rand.Int64()

pkg/es/doc.go

@@ -21,8 +21,8 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"math/rand/v2"
 	"strings"
-	"time"
 
 	"codeberg.org/scip/esctl/pkg/cfg"
 	"github.com/elastic/go-elasticsearch/v9/typedapi/core/deletebyquery"
@@ -45,7 +45,7 @@ func DocAdd(conf *cfg.Config, jsondoc string) error {
 		return fmt.Errorf("supplied document was not valid JSON: %s", err)
 	}
 
-	now := fmt.Sprintf("%d", time.Now().Unix())
+	now := fmt.Sprintf("%d", rand.Int64())
 
 	res, err := conf.DefaultCluster.ES.Create(conf.Index, now).
 		Document(data).