UX-08 2c review: unit settings anchor to inverters, plainer texts

- messages.setting() for one inverter in the list reads
  “Inverter rating” for inverter-b (inverters.max_w), so the config panel
  files per-unit reasons under `inverters`, where the value is changed.
- The tariff card and plausibility reasons name
  “Distribution, levies and VAT” (price_taxes_eur_kwh) again.
- The wrong-direction reasons say "safety stop", the sign_disagree_w
  option says what it protects, and the roster, price-entity,
  integrator_max_w and capacity_kwh texts read more plainly.
- NL: stuurprint -> stuurmodule, "De piekbeperking".

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

goodwe_controller/test_messages.py

@@ -554,7 +554,7 @@ check(f"every label a refusal quotes is the setting's name in en.yaml "
 check("...and a refusal quotes the label and then the key, so the config "
       "panel still files it under that setting",
       messages.setting("max_w", "inverter-b")
-      == "“Inverter rating” (max_w) for inverter-b")
+      == "“Inverter rating” for inverter-b (inverters.max_w)")
 print(f"CI: UX-08 allowlist {len(allow)} entries "
       + ", ".join(f"{k} {sum(1 for x in allow if x.startswith(k + ' '))}"
                   for k in LIMITS))