Site Devices Upgrades

WS /api-ws/v1/stream

{
    "subscribe": "/sites/{site_id}/devices"
}

{
    "event": "data",
    "channel": "/sites/67970e46-xxxx-xxxx-xxxx-xxxxxxxxxxxx/devices",
    "data": {
        "site_id": "67970e46-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
        "device_id": "00000000-0000-0000-1000-xxxxxxxxxxxx",
        "event_type": "fwupdate",
        "detail": {
            "timestamp": 1485381027,
            "status": "inprogress",
            "status_id": 4,
            "progress": 45
        }
    }
}