Prefer FQDN over HostName for IOM hostname display

Some IOMs (IOM1) return a UUID in the HostName field of EthernetInterfaces/1.
The FQDN field is more reliably populated with the actual hostname.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

modules/workflow_check.py

@@ -54,7 +54,8 @@ def _parse_network_data(data: dict) -> tuple:
         ip = gateway = netmask = "--"
 
     mac         = _sanitize(data.get("MACAddress",  "--"))
-    hostname    = _sanitize(data.get("HostName",    "--"))
+    # Prefer FQDN over HostName — some IOMs return a UUID in HostName
+    hostname    = _sanitize(data.get("FQDN") or data.get("HostName") or "--")
     link_status = _sanitize(data.get("LinkStatus",  "--"))
 
     return dhcp_enabled, ip, gateway, netmask, mac, hostname, link_status