docs(adr-115): v0.7.0 release notes + CHANGELOG refresh

## `docs/releases/v0.7.0-mqtt-matter.md` (new)

Full release-readiness document for the v0.7.0 cut. Sections:
- TL;DR — the architectural win in one paragraph
- What's new for end users (HA-DISCO + HA-FABRIC + HA-MIND + 8
   blueprints + 3 Lovelace dashboards)
- What's new for operators (full CLI matrix)
- What's new for developers (feature flags, modules, test counts,
   integration tests, benchmarks, validation harness, witness)
- Benchmark numbers (all ADR §3.7 targets beaten 1.6×–208×)
- Security (wire-boundary audit + 5 fuzz cases + --privacy-mode
   architectural win)
- Reproducibility recipe (one block to verify the whole stack)
- Deferred-to-v0.7.1 (P8b rs-matter SDK wiring + P9b multi-controller
   validation + CSA cert decision)
- Deferred-to-v0.8.0 (hard-fail plaintext + HACS-native integration)
- Acknowledgements (#776, #778, 17 commits, maintainer ACK)

## CHANGELOG.md — refreshed Unreleased entry

The Unreleased ADR-115 bullet was written at 372 tests. Updated to:
- **420 lib tests** (proptest fuzzing added in 0f7a4bd36 + b41fdd75c)
- ~2,560 fuzzed assertions per CI run
- 8 starter blueprints + 3 Lovelace dashboards (originally promised
   3 blueprints — over-delivered)
- mosquitto-backed integration tests + criterion benchmarks
- ESP32 validation harness + witness bundle
- Links to release notes + tracking issue + PR
- Codename trio: HA-DISCO + HA-FABRIC + HA-MIND (the third belonged
   in the changelog all along)

Refs #776, PR #778.

Co-Authored-By: claude-flow <ruv@ruv.net>

CHANGELOG.md

@@ -62,7 +62,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   they can be reintroduced with a real implementation.
 
 ### Added
-- **Home Assistant + Matter integration (ADR-115).** New `--mqtt` and `--matter` flags on `wifi-densepose-sensing-server` expose the full sensing capability set to any Home Assistant install via MQTT auto-discovery (HA-DISCO) and to any Matter controller (Apple Home / Google Home / Alexa / SmartThings) via a built-in Matter Bridge (HA-FABRIC). Includes 21 entity kinds — 11 raw signals + 10 semantic primitives (someone-sleeping, possible-distress, room-active, elderly-inactivity-anomaly, meeting, bathroom, fall-risk, bed-exit, no-movement, multi-room-transition). The semantic primitives run server-side so `--privacy-mode` strips HR/BR/pose values from the wire while still publishing the inferred *states* — the architectural win for healthcare and AAL deployments. Three starter HA Blueprints (distress notify, hallway dim on sleeping, wake routine on bed exit), Lovelace dashboard examples, mTLS support, 32 KB payload-size cap, MQTT-wildcard topic-injection rejection. **372 tests** cover the implementation. See [`docs/integrations/home-assistant.md`](docs/integrations/home-assistant.md), [`docs/integrations/semantic-primitives-metrics.md`](docs/integrations/semantic-primitives-metrics.md), [`docs/adr/ADR-115-home-assistant-integration.md`](docs/adr/ADR-115-home-assistant-integration.md), and tracking issue [#776](https://github.com/ruvnet/RuView/issues/776). Matter SDK spike (P7) and CSA-certification path (P10) deferred to v0.7.1+ per ADR §9.10. Try it: `cargo run -p wifi-densepose-sensing-server --features mqtt --example mqtt_publisher -- --mqtt --mqtt-host 127.0.0.1`.
+- **Home Assistant + Matter integration (ADR-115).** New `--mqtt` and `--matter` flags on `wifi-densepose-sensing-server` expose the full sensing capability set to any Home Assistant install via MQTT auto-discovery (HA-DISCO) and to any Matter controller (Apple Home / Google Home / Alexa / SmartThings) via a built-in Matter Bridge scaffolding (HA-FABRIC, SDK wiring v0.7.1). Includes 21 entity kinds per node — 11 raw signals + 10 inferred semantic primitives (HA-MIND: someone-sleeping, possible-distress, room-active, elderly-inactivity-anomaly, meeting, bathroom, fall-risk, bed-exit, no-movement, multi-room-transition). The semantic primitives run server-side so `--privacy-mode` strips HR/BR/pose values from the wire while still publishing the inferred *states* — the architectural win for healthcare and AAL deployments. Ships **8 starter HA Blueprints** under `examples/ha-blueprints/`, **3 drop-in Lovelace dashboards** under `examples/lovelace/` (including a privacy-mode-compatible healthcare care view), mTLS support, 32 KB payload-size cap, MQTT-wildcard topic-injection rejection, `RUVIEW_MQTT_STRICT_TLS=1` v0.8.0 upgrade path. **420 lib tests** cover the implementation including **~2,560 fuzzed assertions per CI run** (10 proptest cases across wire-boundary security + semantic-bus invariants). Plus mosquitto-backed integration tests in `.github/workflows/mqtt-integration.yml`, criterion benchmarks beating every ADR target by 1.6×–208×, and an ESP32-S3 hardware validation harness (`scripts/validate-esp32-mqtt.sh`) that asserts the full pipeline end-to-end with a witness bundle generator (`scripts/witness-adr-115.sh`) that self-verifies. See [`docs/releases/v0.7.0-mqtt-matter.md`](docs/releases/v0.7.0-mqtt-matter.md), [`docs/integrations/home-assistant.md`](docs/integrations/home-assistant.md), [`docs/integrations/semantic-primitives-metrics.md`](docs/integrations/semantic-primitives-metrics.md), [`docs/integrations/benchmarks.md`](docs/integrations/benchmarks.md), [`docs/adr/ADR-115-home-assistant-integration.md`](docs/adr/ADR-115-home-assistant-integration.md), tracking issue [#776](https://github.com/ruvnet/RuView/issues/776), PR [#778](https://github.com/ruvnet/RuView/pull/778). Matter SDK wiring (P8b) and CSA-certification path (P10) deferred to v0.7.1+ per ADR §9.10. Try it: `cargo run -p wifi-densepose-sensing-server --features mqtt --example mqtt_publisher -- --mqtt --mqtt-host 127.0.0.1`.
 
 - **Real-time CSI introspection / low-latency tap on `wifi-densepose-sensing-server` (ADR-099).**
   New `wifi_densepose_sensing_server::introspection` module wires