- Add docs/user-guide-apple-homepod.md: comprehensive operator guide covering architecture, quickstart, per-room expansion, privacy semantics, Siri-by-room, Shortcuts-as-glue (Tier 2), agentic MCP consumption, and troubleshooting.
- Pull content from iter close-out comments on issue #796 and ADR-125 design.
- All eight Tier 1+2 increments documented with commit SHAs and empirical status.
- Update README.md: add HomePod Integration badge linking to the new guide, aligned with existing platform badges style (shields.io format, Apple logo, black background).
Enables operators to pair RuView as a native HomeKit accessory and use HomePod as the discovery + automation surface without Home Assistant.
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