get_matter_device_info: Test the Matter config entry is set up (#111792)

Ensure the Matter config entry is set up

homeassistant/components/matter/__init__.py

@@ -1,4 +1,5 @@
 """The Matter integration."""
+
 from __future__ import annotations
 
 import asyncio
@@ -45,7 +46,10 @@ def get_matter_device_info(
     hass: HomeAssistant, device_id: str
 ) -> MatterDeviceInfo | None:
     """Return Matter device info or None if device does not exist."""
-    if not (node := node_from_ha_device_id(hass, device_id)):
+    # Test hass.data[DOMAIN] to ensure config entry is set up
+    if not hass.data.get(DOMAIN, False) or not (
+        node := node_from_ha_device_id(hass, device_id)
+    ):
         return None
 
     return MatterDeviceInfo(