derekc 2d3ad3a06c Add login lockout with ntfy alerts and update docs ...

- Lock accounts for 15 minutes after 5 consecutive failed login attempts
- Send urgent ntfy notification when an account is locked
- Send high-priority ntfy notification on login attempt against a locked account
- Auto-reset lockout on expiry; reset counter on successful login
- Add v2.4 migration for failed_login_attempts and locked_until columns
- Add ALLOWED_ORIGINS and SECURE_COOKIES to .env.example
- Update README: lockout row in security table, new ntfy events

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

2026-03-23 23:11:30 -07:00

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