Add unique_id to canary camera (#40054)

homeassistant/components/canary/camera.py

@@ -72,6 +72,11 @@ class CanaryCamera(Camera):
         """Return the name of this device."""
         return self._device.name
 
+    @property
+    def unique_id(self):
+        """Return the unique ID of this camera."""
+        return str(self._device.device_id)
+
     @property
     def is_recording(self):
         """Return true if the device is recording."""