feat: Flusso completo discovery parallelo per 2 inverter

FLUSSO IMPLEMENTATO:
1. All'avvio: registra discovery topics per 2 inverter (hardcoded)
2. Discovery topics ripetuti ogni 5 minuti (invece di 10)
3. Parallel discovery parametri con retry:
   - Tenta discovery fino a 3 volte
   - Se fallisce: attende 5s e riprova
   - Se tutti i tentativi falliscono: assume 2 inverter
4. Estrazione dati ogni 30s per entrambi gli inverter

NAMING:
- Inverter 1: voltronic_inv1_*
- Inverter 2: voltronic_inv2_*

Discovery topics include tutti i 33 parametri per entrambi gli inverter

sources/inverter-mqtt/entrypoint.sh

@@ -236,7 +236,7 @@ fi
 
 echo ""
 echo "=== Starting MQTT Bridge Services ==="
-echo "Using parallel inverter mode"
+echo "Using parallel inverter mode (2 inverters)"
 echo ""
 
 # Wait a bit for the device to be ready
@@ -246,10 +246,10 @@ sleep 2
 MQTT_PUSH_SCRIPT="/opt/inverter-mqtt/mqtt-push-parallel.sh"
 MQTT_INIT_SCRIPT="/opt/inverter-mqtt/mqtt-init-parallel.sh"
 
-# Init the mqtt server for the first time, then every 10 minutes (600 seconds)
+# Init the mqtt server for the first time, then every 5 minutes (300 seconds)
 # This will re-create the auto-created topics in the MQTT server if HA is restarted...
-echo "Starting MQTT initialization service (every 10 minutes)..."
-watch -n 600 "$MQTT_INIT_SCRIPT" > /dev/null 2>&1 &
+echo "Starting MQTT initialization service (every 5 minutes)..."
+watch -n 300 "$MQTT_INIT_SCRIPT" > /dev/null 2>&1 &
 
 # Run the MQTT Subscriber process in the background (so that way we can change the configuration on the inverter from home assistant)
 echo "Starting MQTT subscriber for commands..."