UX-13 P0 review: keep unread keys, back off a failed entity read

- uimodel: editing a listed inverter keeps the stored flat keys, and a
  region of "own" keeps a stored price_taxes_profile (both were dropped).
- haentities: a failed read also waits CACHE_S, so polls while Home
  Assistant is down do not queue one 10 s read each.
- ui_text: the Flanders preset names its DSO, and the help says
  Wallonia and Brussels have no figures yet. REGION_PRESETS cites the card.
- tests: decode of a reversed solar row, both kept keys, the backoff.

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

goodwe_controller/test_uimodel.py

@@ -128,6 +128,9 @@ _listed = dict(SITE, setpoint_entity="", inverters=[
 _l1 = edit(_listed, inverters=[dict(_listed["inverters"][0], max_w=1800)])
 check("a list of one stays a list, so the inverter keeps its name and stored "
       "state", _l1["inverters"] == [dict(_listed["inverters"][0], max_w=1800)])
+check("editing a listed inverter keeps the unread flat keys as stored",
+      all(_l1[k] == _listed[k] for k in ("setpoint_entity", "soc_entity",
+                                          "batt_entity", "max_w")))
 check("a name on the flat inverter is refused rather than dropped",
       raises(lambda: edit(SITE, inverters=[dict(_card, name="garage")])))
 _raw = dict(SITE, inverters="garage")
@@ -137,6 +140,10 @@ check("a roster no card can show is kept when another field is saved, and "
       and raises(lambda: edit(_raw, inverters=[_card])))
 
 print("\n3. solar rows")
+check("a stored flip reads as a reversed row",
+      U.options_to_ui(dict(DEFAULTS, pv_entity="sensor.pv",
+                           pv_invert_entities=["sensor.pv"]))["ui.solar"]
+      == [{"entity": "sensor.pv", "reversed": True}])
 check("one row writes pv_entity",
       edit(DEFAULTS, ui__solar=[{"entity": "sensor.pv", "reversed": False}])
       ["pv_entity"] == "sensor.pv")
@@ -195,6 +202,11 @@ _own = dict(DEFAULTS, price_taxes_eur_kwh=0.06)
 check("a figure that is no preset reads as 'own', and choosing Flanders "
       "writes the preset", U.options_to_ui(_own)["ui.region"] == U.OWN
       and edit(_own, ui__region="flanders")["price_taxes_eur_kwh"] == 0.11736)
+_prof = dict(DEFAULTS, price_taxes_eur_kwh=0.12,
+             price_taxes_profile='{"day": 0.14, "night": 0.1}')
+check("'own' keeps a stored levies table when the figure is edited",
+      edit(_prof, price_taxes_eur_kwh=0.13)["price_taxes_profile"]
+      == _prof["price_taxes_profile"])
 check("'own' stores the typed figure",
       edit(DEFAULTS, ui__region=U.OWN, price_taxes_eur_kwh=0.13)
       ["price_taxes_eur_kwh"] == 0.13)