Implement external state restoration

tests/test_number.py

@@ -102,6 +102,8 @@ async def test_number(
 
     assert cluster.read_attributes.call_count == 3
 
+    assert entity.name == "PWM1"
+
     # test that the state is 15.0
     assert entity.state["state"] == 15.0
 

zha/application/platforms/number/__init__.py

@@ -141,14 +141,13 @@
         """Return the value step."""
         return self._analog_output_cluster_handler.resolution
 
-    @functools.cached_property
+    @property
     def name(self) -> str | None:
         """Return the name of the number entity."""
         description = self._analog_output_cluster_handler.description
-        # TODO what happened here?
-        if description is not None and len(description) > 0:
-            return f"{super().name} {description}"
-        return super().name
+        if not description:
+            return None
+        return description
 
     @functools.cached_property
     def icon(self) -> str | None: