Extract decimal serial numbers from devname parameters (e.g., "SXM5_SN_1653925027099")
instead of hex PCIe Device Serial Numbers. This provides the correct GPU serial
numbers as they appear in NVIDIA diagnostics tooling.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Parse inventory/output.log to extract GPU serial numbers from lspci output,
expose them via serials API, and add GPU category to web UI.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>