- Add Deebot Ozmo 920 Series (vi829v) to the tested compatibility table
(confirmed working with Ecovacs Home app via MQTT protocol)
- Document that newer robots using the jmq-ngiot protocol connect on
port 443 instead of the standard MQTT port 8883. Add iptables
PREROUTING REDIRECT rule to DNS_Setup.md so users can intercept
these connections and forward them to Bumper's MQTT listener.
Confirmed on OZMO 920: bot resolves jmq-ngiot-{countrycode}.area.ww.ecouser.net
(already covered by DNS wildcard and cert SANs) but connects on 443,
silently failing without this redirect.
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