cli/container: Pretty-print creation timestamp in list-objects outp…

…ut (#2653)

CHANGELOG.md

@@ -7,6 +7,7 @@ Changelog for NeoFS Node
 - Policer's setting to the SN's application configuration (#2600)
 - Support of verified domains for the storage nodes (#2280)
 - `neofs-lens storage status` CLI command (#2550)
+- Human-readable output of objects' creation timestamp to `neofs-cli container list-objects` (#2653)
 
 ### Fixed
 - `neofs-cli netmap netinfo` documentation (#2555)

cmd/neofs-cli/modules/container/list_objects.go

@@ -73,7 +73,15 @@ var listContainerObjectsCmd = &cobra.Command{
 				if err == nil {
 					attrs := resHead.Header().UserAttributes()
 					for i := range attrs {
-						cmd.Printf("  %s: %s\n", attrs[i].Key(), attrs[i].Value())
+						key := attrs[i].Key()
+						val := attrs[i].Value()
+
+						if key == object.AttributeTimestamp {
+							cmd.Printf("  %s: %s (%s)\n", key, val, common.PrettyPrintUnixTime(val))
+							continue
+						}
+
+						cmd.Printf("  %s: %s\n", key, val)
 					}
 				} else {
 					cmd.Printf("  failed to read attributes: %v\n", err)