Extends the container-host script to cover the rest of the Phase 1/9 stack
(README's outstanding checklist item) so a single Debian host setup gets
Home Assistant plus the full companion stack: automation glue, monitoring,
a dashboard, push notifications, container management, and optional
scheduled backups. Also fixes a stale comment referencing a network-attached
SLZB-06 coordinator when the plan and config target a USB CC2652P dongle.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>