Inspur/Kaytus onekeylog dumps only exposed the mechanical carrier FRU serial
(component/fru.txt Board Product) as board identity. That serial doesn't
change when the actual NVIDIA HGX baseboard (SXM+NVSwitch "delta board") is
swapped, causing false "board unchanged" conclusions. Parse the real HGX
tray/baseboard Model/PartNumber/SerialNumber triples from
HGX_HWInfo_FWVersion.log into a new HardwareConfig.HGX field, and normalize
Redfish's NA/N-A placeholders to empty across HGX identity parsing.
Closes#21
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>