Feature: Aggregat-Gerät + Energie-Dashboard Sensoren (v1.2.0)

- main.py: AGG_SENSOR_IDS/AGGREGATE_META — Mapping sensor_id → Aggregat-Bucket
  _compute_aggregates() summiert alle online Geräte nach jedem Poll
  /api/data liefert jetzt auch "aggregates" Schlüssel
- mqtt_publisher.py: publish_aggregates() + _publish_aggregate_discovery()
  Eigenes HA-Gerät "ShineBridge Gesamt" (device_id: shinebridge_aggregate)
  MQTT Topic: shinebridge/aggregate/state
- index.html: renderAggregates() — "Gesamt"-Sektion oben im Live-Tab

Aggregierte Sensoren (alle kompatibel mit HA Energie-Dashboard):
  PV: total_pv_power, total_ac_power, total_energy_today, total_energy_total
  Netz (SDM-630): grid_power, grid_import_kwh, grid_export_kwh
  Batterie (SPH): bat_charge/discharge_power/total, bat_soc (Ø)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

haos-addon/config.yaml

@@ -1,5 +1,5 @@
 name: ShineBridge
-version: "1.1.5"
+version: "1.2.0"
 slug: shinebridge
 description: Growatt Wechselrichter lokal in Home Assistant — Modbus TCP via ShineLAN-X, MQTT Discovery, Web UI
 url: https://gitea.bitfire.work/retr0/Growatt-Wechselrichter-HAOS