fix(feed-items): supply NVIDIA versions at the data shape the release feed consumes

[castrojo]

Problem

FeedItems.tsx looks for osInfo.majorPackages.NVIDIA, but fetch-firehose.js only writes Podman, systemd, and bootc into majorPackages.

Evidence

The current bluefin-os-stable record contains { "Podman": "5.8.2", "systemd": "259.5", "bootc": "1.15.2" } and no NVIDIA key, so the release summary accessor always returns null.

Expected

Provide a release-appropriate NVIDIA version through this data contract or read it from the driver-version dataset.