Add kernel-aware NAS knob summaries

[Darkroom4364]

Closes #81.

Summary:

• vary the generated NAS catalog across the QK-norm/RoPE branch instead of hard-coding QK-norm on
• add machine-readable knob summaries for constrained and all candidates
• refresh the multi-hardware NAS artifact and docs with the constrained knob winners

Verification:

• python3 -m unittest tests.test_arch_cost_model
• python3 -m compileall scripts/nas_experiment.py tests/test_arch_cost_model.py src/research_engine/arch_cost_model.py
• python3 scripts/check_public_claim_artifacts.py

Note: python3 -m unittest discover is blocked locally by missing optional dependencies: numpy, pytest, and sklearn.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 7decf578-0cd2-4abb-8d7a-35c4462822f1

📥 Commits

Reviewing files that changed from the base of the PR and between d4222c2 and b47d7d0.

📒 Files selected for processing (6)

• docs/research/kernel-aware-nas.md
• docs/results/README.md
• docs/results/kernel-aware-nas-multihardware.json
• docs/results/kernel-aware-nas-multihardware.md
• scripts/nas_experiment.py
• tests/test_arch_cost_model.py

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch issue-81-kernel-aware-nas-knobs

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