docs: Qwen3.5 single-layer graft Report 16 results

[mvillmow]

Summary

• documents the top arm from the 30-arm Qwen3.5 single-layer graft screen
• compares its complete 1M and 25M MMLU-Pro/BBH evaluations
• binds the report to immutable checkpoint and evaluation receipt hashes

Result

The combined MMLU-Pro + BBH score changed from 1.134236 at 1M to 1.131933 at 25M (-0.002303).

Validation

• git diff --check
• verified checkpoint/evaluation completion receipts and protocol identity
• MkDocs/pre-commit tooling is unavailable in the current environment

[mvillmow]

Closing because this experiment report was published to the wrong repository. It belongs in the New Developer reporting workflow, not the vLLM source repository.