When two Proxmox nodes have the same hostname (e.g., 'px1' on different IPs),
the getHostAgentTemperature function was matching by hostname alone, causing
both nodes to show temperature from whichever host agent appeared first.
The fix:
- Added getHostAgentTemperatureByID that first tries matching by LinkedNodeID
(the unique node ID) before falling back to hostname matching
- Updated the caller to pass modelNode.ID for precise matching
- Maintains backwards compatibility for setups where linking hasn't occurred
Related to #891
800fab10c2