review: drop getattr fallback, read metric.display_id directly

display_id is in the released library now, so the getattr fallback is dead weight.

Author: pos-ei-don

custom_components/victron_mqtt/entity.py

@@ -75,9 +75,8 @@ def __init__(
             # (e.g. solarcharger_3_solarcharger_total_pv_yield ->
             # solarcharger_3_total_pv_yield). Home Assistant applies a suggested
             # entity_id only when first creating an entity, so this affects NEW
-            # entities only; existing installs are unchanged. getattr keeps it
-            # safe if the bundled library predates display_id.
-            display_id = getattr(metric, "display_id", metric.unique_id)
+            # entities only; existing installs are unchanged.
+            display_id = metric.display_id
             self._attr_unique_id = f"{entity_platform}.{ENTITY_PREFIX}_{installation_id}_{metric.unique_id}"
             self.entity_id = f"{entity_platform}.{ENTITY_PREFIX}_{installation_id}_{display_id}"
         self._attr_suggested_display_precision = metric.precision