feat: add smart home runtime foundation

ops/borg-ui/BACKUP_SCOPE.md

@@ -48,6 +48,10 @@ The Unraid flash configuration archive is intentional as well and must be treate
 | Grafana | SQLite dump from `monitoring_grafana_data` + provisioned config in Git | `/local/borg-dumps`, `monitoring/grafana/provisioning`, `monitoring/grafana/dashboards` |
 | Filebrowser | file-backed state dump + file data | `/local/borg-dumps`, `/local/appdata/filebrowser` |
 | InfluxDB 3 Core | file data | `/local/appdata/influxdb3/data`, `/local/appdata/influxdb3/plugins` |
+| Home Assistant | HA-native backup + file state | `/local/appdata/homeassistant`, `/local/services/smart-home-kalli` |
+| Smart-Home MQTT / Mosquitto | file data | `/local/appdata/mosquitto/config`, `/local/appdata/mosquitto/data`, `/local/appdata/mosquitto/log` |
+| Zigbee2MQTT (planned) | file data + coordinator state | `/local/appdata/zigbee2mqtt`, `/local/services/smart-home-kalli` |
+| ESPHome (planned) | Fachrepo + optional build/runtime cache | `/local/services/smart-home-kalli/esphome`, optional `/local/appdata/esphome` |
 | Hermes Agent | file data + SSH key | `/local/appdata/hermes-agent/data`, `/local/secrets/hermes_runner_id_ed25519` |
 | BentoPDF | rebuildable | no critical persistence in compose |
 
@@ -87,6 +91,7 @@ The live Unraid User Scripts execute repo scripts from `/mnt/user/services/homel
 - SQLite: `gitea`, `vaultwarden`, `speedtest-tracker`, `borg-ui`, `grafana`
 - File-backed state: `filebrowser.bolt.dump`
 - Unraid flash config: `unraid-flash-config.tar.gz` plus `unraid-flash-config.tar.gz.sha256`
+- Home Assistant native backups: created by HA under `/mnt/user/appdata/homeassistant/backups` and captured as file state
 
 ## Explicitly Not Backed Up as Raw Live DB Files