Second half of the Ring integration (handoff §12):
- RingTopics + RingNormalizer (H3): parse ring/<loc>/<cat>/<id>/<entity>/state,
map ding/motion/contact/lock/battery; bridge status topic drives the addon
connection state. Defensive — unknown topics are ignored, never junk devices.
- IngestRingMessage (H4, single ingest path): auto-creates cloud-flagged Ring
devices on first sight, monotonic race-safe state upsert, broadcasts live.
Gated on the addon being installed (cached) so a still-running bridge can't
recreate devices after uninstall.
- Shared AppliesDeviceState trait: the monotonic upsert now lives once, used by
both Shelly and Ring ingest (MqttTest guards the Shelly path).
- Listener subscribes ring/#. ring-mqtt container (opt-in `addons` compose
profile) as least-privileged `ring` MQTT user (ACL: ring/# only); gen-passwd
seeds the account. "Cloud" badge on Ring devices in list + detail.
11 Ring tests (topic parse, normalizer, bridge status, auto-create, install
gate, unknown-topic guard, out-of-order). Suite 40 green; 12/12 tabs clean.
Live-verified: real MQTT ring/.../ding + info publish → cloud device created
with ding + battery state. (Real Ring OAuth login runs in the ring-mqtt sidecar.)
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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