Publish step8000 follow-up analysis package

Add step-8000 diagnostics package and eval tooling

Publish second training analysis bundle

Publish repaired-overlay rerun artifacts

Publish v1 restart and analysis artifact bundles

Update artifact documentation: experiments/netlist_to_layout_v1/v1-full-20260306-1900-async3g1e_step0001-012000/metrics/final_eval_step012000.json

Update artifact documentation: experiments/netlist_to_layout_v1/v1-full-20260306-1900-async3g1e_step0001-012000/metrics/best_eval_by_spec.json

Update artifact documentation: experiments/netlist_to_layout_v1/v1-full-20260306-1900-async3g1e_step0001-012000/README.md

Add checkpoints, metrics, logs, and metadata for v1-full-20260306-1900-async3g1e step0001-012000