docs: link Runtime Jetson evidence reports

[hyeokjun32]

Summary

• Linked Runtime Jetson Markdown report snapshots from portfolio submission docs.
• Connected the 25W Jetson evidence summary and 15W/25W power-mode comparison to the final validation docs.
• Kept the scope as local-first validation evidence documentation.

Validation

• poetry run python3 -m pytest -q
• bash scripts/demo_pipeline_full.sh --help

Impact

• Makes submitted portfolio docs trace Jetson numbers back to committed Runtime report snapshots.
• Improves evidence reproducibility without changing API/result schema or product scope.

Notes

• No feature/API behavior changed.
• Runtime remains execution evidence; Lab remains deployment decision owner.