Adds `mqtt` and `matter` Cargo features (default off) plus 20+ new CLI
flags wired through cli.rs per ADR-115 §3.8 / §3.10 / §3.11 / §3.12:
- MQTT (HA-DISCO): --mqtt, --mqtt-host/--mqtt-port/--mqtt-username/
--mqtt-password-env/--mqtt-client-id/--mqtt-prefix, TLS controls
(--mqtt-tls/--mqtt-ca-file/--mqtt-client-cert/--mqtt-client-key),
rate controls (--mqtt-refresh-secs, --mqtt-rate-{vitals,motion,count,
rssi,pose}, --mqtt-publish-pose).
- Privacy (ADR-106): --privacy-mode strips HR/BR/pose pre-publish.
- Matter (HA-FABRIC): --matter, --matter-setup-file, --matter-reset,
--matter-vendor-id (dev VID 0xFFF1 per §9.9), --matter-product-id.
- Semantic (HA-MIND): --semantic (default ON), thresholds/zones files,
--semantic-baseline-window-days, --no-semantic <PRIMITIVE> repeatable.
rumqttc 0.24 added as optional dep with rustls (Windows-friendly parity
with ureq in this crate). matter-rs deferred to P7 spike per §9.10.
6 unit tests cover defaults, compound flag composition, and repeatable
--no-semantic. Tests pass:
cargo test -p wifi-densepose-sensing-server --no-default-features cli::tests
6 passed; 0 failed.
Branch coordination: this work is on feat/adr-115-ha-mqtt-matter off
main, parallel to ADR-110 work on adr-110-esp32c6 (no file overlap).
Refs #776 (ADR-115 implementation tracking issue).
Co-Authored-By: claude-flow <ruv@ruv.net>
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