The #29 detector grepped `chip=0x10de...`, but FreeBSD's chip field is
chip=0x<device><vendor> with vendor 0x10de in the LOW 16 bits — so it never
matched and the device id / recommended-branch logic was dead.
- nvidia_device_id: match `chip=0x<4hex>10de` and strip to the device id
(chip=0x1c8c10de -> 1c8c).
- nvidia_branch_for_device: non-overlapping architecture ranges returning the
build's lane labels {390,470,590} so detected vs staged compare correctly;
empty/unknown -> 590 (safe default for modern unknown hardware).
Validated on Linux against representative ids: Fermi 0e22->390, Kepler 0fc8->470,
Maxwell 1380 / Pascal 1b81 / Turing 1c8c / Ada 2684 ->590, empty->590. sh -n clean.
This is the detection brain for the universal NVIDIA auto-install lane; the
on-image NVIDIA repo + boot-time install is the FreeBSD build-side work (handoff).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
