docs(articles): Pellis-Trinity v21 — Tier-D Olsen golden-balance quotation block

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Summary

Adds a single new body section to the style-safe Pellis-Trinity v21 article: body/12-historical-context-olsen.md. The block reproduces the Plato / Kepler / Olsen "golden balance" historical passage verbatim, but is framed and gated as Tier-D historical-geometric context — not evidence, not a derivation, not endorsement.

What the block contains (exact wording preserved)

• The Kepler "two great treasures" paragraph.
• The Olsen "Golden Thread" paragraph (Plato's One and Indefinite Dyad → Penrose / Shechtman / Kroto / Coldea $E_{8}$ → paradigmatic symmetry / golden balance → golden mean number system ${1/\varphi^{2},1/\varphi,1,\varphi,\varphi^{2}}$).
• The terminal claim from the source: "The golden balance can be moved along the golden mean number system and retain its structural integrity."

What was deliberately omitted (reviewer safety)

• The two endorsement letters from the source archive (Nobel-laureate nominations of a particular researcher) are not reproduced. They cannot serve as evidence.
• No new figure is introduced. The original fig:golden_balance is replaced by an in-text pointer; no replacement PDF page, no manual annotation.

Editorial framing

The first paragraph of the new section explicitly states:

They are included as historical context only and are not used as statistical, formal, or physical evidence in the paper.

A closing "What this block does not claim" subsection re-states the boundary against any reading as a derivation or endorsement.

QA additions (qa/pellis-trinity-full.qa.toml)

forbidden_phrases adds 6 entries to keep the endorsement-style claims out of the rendered text:

• Binnig, Prigogine, next Nobel prize in Physics, King Faisal, grand design of a deeper understanding of nature, predict with astonishing precision.

required_phrases adds 6 anchors to guarantee the Tier-D framing and the exact quotation are present:

• Scott Olsen quotation: the golden balance
• Tier-D historical-geometric context
• included as historical context only and are not used as statistical, formal, or physical evidence
• The golden balance can be moved along the golden mean number system and retain its structural integrity
• Geometry has two great treasures
• What this block **does not** claim

Source-level QA verifier (run on this branch)

22 forbidden patterns: 0 FAIL
19 required phrases:   0 FAIL
 5 URL anchors:        0 FAIL

Test plan

• Re-run tri article qa pellis-trinity-full once the tri article subcommand is available on a Rust/Cargo-equipped runner; expect the 22+19+5 gates to remain green.
• When tri article build pellis-trinity-full --pdf --html is run, confirm the new section appears between 11-followups.md and 99-references.md (lexical order), with no figure inserted, and /Annots = 0.
• Manual eyeball: confirm the editorial-note paragraph is rendered immediately under the section heading and that no Binnig / Prigogine / El Naschie endorsement wording is present anywhere in the rendered article.

Honest caveats

• cargo is unavailable in this build environment; tri article has no article subcommand in crates/tri-cli/ at HEAD anyway. No PDF was built, and none is required by this PR — this is a source-only change on top of docs(articles): pellis-trinity-full style-safe v21 source #821.
• No manual PDF page replacement, no pypdf surgery, no overlay blanking, no replacement of figures with plain text pages. The annotation policy (/Annots = 0 unless real link annotations) is unchanged.

Refs #821 (style-safe baseline merged on main).