Resilience pass: bulletproof recovery + FWS / fault polling + EG4 discovery refresh

LVX6048/config/powermon/powermon.yaml

@@ -66,3 +66,17 @@ commands:
           type: hass
           discovery_prefix: homeassistant
           entity_id_prefix: lvx6048_1
+
+  # Fault + warning bits (2-digit fault_code + 16 boolean warning flags).
+  # Polled every 30 s — fast enough to be useful in HA, slow enough not to
+  # flood the bus during normal "No fault" steady state.
+  - command: FWS
+    trigger:
+      every: 30
+    outputs:
+      - type: mqtt
+        topic: powermon/lvx6048_1/FWS
+        format:
+          type: hass
+          discovery_prefix: homeassistant
+          entity_id_prefix: lvx6048_1