- Flutter: drift + SQLCipher local store for tone samples/KV with
secure-storage passphrase; migrate legacy SharedPreferences
- Core: FCM notifyUser on escalation, admin push-test, push metrics,
DELETE session for multi-device logout
- Docs/roadmap B checkboxes updated; Linux SQLCipher apt notes
Co-authored-by: okuma <o0kuma@users.noreply.github.com>
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