Handle message-less Grafana alerts

contrib/modules/grafana.py

@@ -3,4 +3,7 @@ import json
 
 async def process(request):
 	obj = json.loads(await request.text())
-	return f'{obj["title"]} - {obj["message"]}'
+	if 'message' in obj:
+		return f'{obj["title"]} - {obj["message"]}'
+	else:
+		return obj['title']