Support DGX Spark metadata and benchmark contributor credit

[EHxuban11]

• Builds on Add YOLOv9-T and RF-DETR-S benchmarks on DGX Spark #14: retains DavidDiazMerino's commits and both original Spark submission files. Merge Add YOLOv9-T and RF-DETR-S benchmarks on DGX Spark #14 first; this branch then contributes only the website/support follow-up.
• Label Spark as a desktop system with 128 GB unified memory; remove unsupported FP32/TDP catalogue values and link NVIDIA specifications.
• Show dataset variant, submitter credit, source PR, and run JSON on hardware/model tables.
• Add separately validated publication credit, optional confirmed benchmark authors and profile links, anonymous display, and a PR authorship template.
• David ran the benchmarks. This follow-up did not rerun them; only his public PR submitter credit is populated. Personal author display and social links await his choice.
• Verified: all 710 measurement records unchanged except publication credit; submission validation, 7 credit tests, lint, production build, and local browser inspection passed.
• Fix the pre-existing compatibility gate: legacy normalization applies to full-val detection only; all 710 rows retain metadata and duplicate-coordinate checks. npm test passes, including 3 regression tests. Not deployed.

Code provenance

• Original website/support changes; benchmark files and original commits retained from DavidDiazMerino's Add YOLOv9-T and RF-DETR-S benchmarks on DGX Spark #14. No third-party code copied or adapted.