Lefant N3: make power dp optional

Issue #1393

custom_components/tuya_local/devices/lefant_n3_vacuum.yaml

@@ -10,6 +10,7 @@ primary_entity:
     - id: 1
       name: power
       type: boolean
+      optional: true
     - id: 2
       name: activate
       type: boolean
@@ -231,6 +232,7 @@ secondary_entities:
       - id: 1
         type: boolean
         name: button
+        optional: true
   - entity: button
     name: Pause
     icon: "mdi:pause"