fix: version property returns dict instead of string on V2 API

[DarkByteZero]

Problem

The V2 API returns the versionc sensor as a dict:

{"title": "6.1", "raw": "6.1", "description": "", "icon": "", "image": "", "discover_url": ""}

The version property returns this dict directly, so Home Assistant passes it to DeviceInfo(sw_version=...) and the frontend displays "[object Object]" instead of "6.1".

Fix

Extract the string from the dict:

v = self.hub_data.get("sensors", {}).get("versionc", "")
if isinstance(v, dict):
    return v.get("title", v.get("raw", ""))
return str(v) if v else ""

Confirmed against the live V2 API.