l8k: Validate

PREREQUISITE: Read ../k8s-launch-kit-shared/SKILL.md for install paths, global flags, and exit codes.

This workflow uses the default host target; --target host is equivalent. The CLI snapshots validation arguments and runs the standalone Host validation and report service through the target registry; checks and report semantics are unchanged.

Verify that a previously generated and deployed NVIDIA networking deployment is correctly applied and matches the selected Network Operator release. Apply docs/user/validation.md#worked-acceptance-decisions to the report; compare intended and completed worker/rail coverage before acceptance.

What it checks