Address Codex security review:
- ForgotPassword + clusev:reset-admin now rotate remember_token, so a stolen
remember-me cookie cannot survive a password reset (the email-token path
already did this).
- useRecoveryCode reads/checks/removes under a row lock (DB transaction +
lockForUpdate), so two concurrent requests can't both spend the same one-time
code (replay).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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