deepScanRestoreNoteState method
The #390 post-restore deep-scan note's lifecycle for the wallet currently
on disk. notApplicable when unknown/unset (fail-safe: a wallet whose
provenance we can't read gets NO note). This is a durable provenance +
acknowledgement fact — the same host-UX category as isBackupConfirmed,
NOT wallet/crypto state (design invariant 1); it stores NO secret.
Implementation
@override
Future<DeepScanRestoreNoteState> deepScanRestoreNoteState() async =>
deepScanNote;