retryVault static method
Retries opening a vault that was locked at startup. Returns true once it is usable.
Implementation
static Future<bool> retryVault() async {
await _ensure();
final _BucketIndex index = _index(UStorageBucket.vault);
if (index.available) return true;
index
..available = true
..entries.clear();
await _loadIndex(index);
return index.available;
}