Update light to handle MRS100

[impulsio]

On device MRS100 it reports as Handle Light but has no light data then digest is empty We test if digest has key light before gathering data

Data received is :

Received message from topic /app/2876630-43ababbc1cc8a332cc2188f9902c6779/subscribe: b'{
	"header": {
		"messageId": "f589abcb7536a53ae15fa288dba2b3ad",
		"namespace": "Appliance.System.All",
		"triggerSrc": "Android",
		"method": "GETACK",
		"payloadVersion": 1,
		"from": "/appliance/2211013555341970080148e1e9aeb62a/publish",
		"uuid": "2211013555341970080148e1e9aeb62a",
		"timestamp": 1773903089,
		"timestampMs": 299,
		"sign": "fab44bf26f90f51b333c22b8e816a26c"
	},
	"payload": {
		"all": {
			"system": {
				"hardware": {
					"type": "mrs100",
					"subType": "un",
					"version": "7.0.0",
					"chipType": "rtl8710cm",
					"uuid": "2211013555341970080148e1e9aeb62a",
					"macAddress": "48:e1:e9:ae:b6:2a"
				},
				"firmware": {
					"version": "7.6.20",
					"homekitVersion": "6.3",
					"compileTime": "2025/12/08-18:16:09",
					"encrypt": 1,
					"wifiMac": "3a:07:16:e8:a6:00",
					"innerIp": "192.168.1.79",
					"server": "mqtt-eu-4.meross.com",
					"port": 443,
					"userId": 2876630
				},
				"time": {
					"timestamp": 1773903089,
					"timezone": "Europe/Paris",
					"timeRule": [
						[
							1679792400,
							7200,
							1
						],
						[
							1698541200,
							3600,
							0
						],
						[
							1711846800,
							7200,
							1
						],
						[
							1729990800,
							3600,
							0
						],
						[
							1743296400,
							7200,
							1
						],
						[
							1761440400,
							3600,
							0
						],
						[
							1774746000,
							7200,
							1
						],
						[
							1792890000,
							3600,
							0
						],
						[
							1806195600,
							7200,
							1
						],
						[
							1824944400,
							3600,
							0
						],
						[
							1837645200,
							7200,
							1
						],
						[
							1856394000,
							3600,
							0
						],
						[
							1869094800,
							7200,
							1
						],
						[
							1887843600,
							3600,
							0
						],
						[
							1901149200,
							7200,
							1
						],
						[
							1919293200,
							3600,
							0
						],
						[
							1932598800,
							7200,
							1
						],
						[
							1950742800,
							3600,
							0
						],
						[
							1964048400,
							7200,
							1
						],
						[
							1982797200,
							3600,
							0
						]
					]
				},
				"online": {
					"status": 1,
					"bindId": "vw44MizgGEQWwSh6",
					"who": 1
				}
			},
			"digest": {}
		}
	}
}'

[impulsio]

This is to correct issue #432