fix(backups): получать нативный экспорт и проверить восстановление из S3

docs/ux-ui/acceptance/s3-native230-version-cleanup.json

@@ -0,0 +1,21 @@
+{
+  "at": "2026-10-14T03:27:26.571Z",
+  "bucketConfigurationWrites": 0,
+  "prefixes": [
+    {
+      "prefix": "mmapp-acceptance/a395b3db-8f34-4335-ae67-9a635f5e7c6a",
+      "versionsBefore": 3,
+      "deleteMarkersBefore": 3,
+      "removed": 6,
+      "versionsAndMarkersRemaining": 0
+    },
+    {
+      "prefix": "mmapp-acceptance/f9051fac-f481-44cf-9410-e7ff153da0ed",
+      "versionsBefore": 3,
+      "deleteMarkersBefore": 3,
+      "removed": 6,
+      "versionsAndMarkersRemaining": 0
+    }
+  ],
+  "passed": true
+}