[AI assisted]: Improve system console statistics performance (#29899)

```release-note
NONE
```

Co-authored-by: Matthew Birtch <mattbirtch@gmail.com>

server/i18n/en.json

@@ -5218,10 +5218,18 @@
     "id": "app.file_info.get_by_post_id.app_error",
     "translation": "Failed to find files for post."
   },
+  {
+    "id": "app.file_info.get_count.app_error",
+    "translation": "Failed to get count of all files."
+  },
   {
     "id": "app.file_info.get_for_post.app_error",
     "translation": "Unable to get the file info for the post."
   },
+  {
+    "id": "app.file_info.get_storage_usage.app_error",
+    "translation": "Failed to get storage usage of all files."
+  },
   {
     "id": "app.file_info.get_with_options.app_error",
     "translation": "Unable to get the file info with options"