User: the Ring bridge should start on its own, not via a manual command. Made
ring-mqtt part of the always-on stack (dropped the `addons` compose profile) —
it starts with `docker compose up -d`, idle until you log in. The setup guide no
longer shows a start command; it just links to the bridge UI for the Ring login
(+ 2FA) and reflects the real bridge status. README updated.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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