The controller (main-b1f294d, konairius/mqtt-account-controller#13)
delivers a password account to a namespace Secret. admin moves into the
register with its password in Secret mqtt-admin-password; Dynamic
Security is asked first, so it replaces the password_file login without
a broker restart. The controller gets get/create/patch/delete on that
Secret by name.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>