Refresh the arXiv note to the current results (dose-fragility 3-vs-3, MoE, methods lesson)

[bamdadd]

The committed docs/note.tex/note.pdf had gone stale against docs/note.md. This rebuilds them from the current source so the paper is submission-ready (submission itself still awaits an explicit go).

What's new in the paper

• Cross-model dose-fragility (§4). The pinned norm-relative k=2 dose collapses coherence out-of-family: DeepSeek-Coder-33B-Instruct (injected coherent 0.042, random-direction 0.093 vs 1.000; 0/216 strict) and CodeLlama-34B-Instruct (0.056 / 0.060 vs 1.000; 0/216 strict). A three-versus-three split — collapse on {Coder-7B, DeepSeek-33B, CodeLlama-34B}, hold on {Coder-32B 0.773, MoE 0.750, dense Qwen}. Both are broken-model nulls (the matched-norm control collapses alongside the injected condition), invalid tests that enter nothing into the headline.
• Corrected methods lesson. A cheap rule-based coherence gate passed on both collapsed models, but on identical transcripts rated 0.79–0.89 coherent while the Bedrock judge rated 0.04–0.06 — the proxy is too lenient. Length is ruled out (CodeLlama's gate sampled at the full 200-token scoring length). A gate must use the scoring judge.
• Cross-architecture MoE probe (§5). Qwen1.5-MoE-A2.7B-Chat: STEP-1 confirms the injection hook is live (routing changed at 0.786 of positions); STEP-2 is a genuine null (0/216, coherence holds at 0.750). The null is predetermined by scale and post-training, not an architecture verdict.
• Total spend corrected to ~$23 ($6.6 GPU + ~$16 judge) to match RESULTS.md.

Unchanged

Core 7B/14B/32B trend table, the 32B three-way, the hero figure, and the logit-lens mechanism — same numbers (Coder-32B 5/216, n=1).

Verification

• pdflatex compiles clean, 7 pages; both new tables render within margins.
• Every number cross-checked against live RESULTS.md (independent adversarial audit, 6/6 pass).
• No AI attribution in source or PDF metadata; author Bamdad Dashtban. Lindsey et al. arXiv:2601.01828 cited.

Rebuild: cd docs && make. Not submitted to arXiv; endorser email not sent — both await an explicit go.