paper (Phase 2): fold hardened E13 into both versions, citation refresh, arXiv package

Speciation section rewritten around the hardened results: alignment
modulo the full function-preserving symmetry group (answers 2606.23607
preemptively), the hybrid-fitness cliff (0.97 -> 0.03), the mu(S)/2
floor, and the pre-registered emergent converse (no isolation without
functional conflict; the merge rescues forgetting specialists) — in the
abstract, §5, §13 ledger, and the accessible version.

Citation refresh (author names verified via arXiv API): concede
First-Extinction Law (Benati 2509.20101) and quantitative-trait collapse
(Yoon 2407.17493) alongside Riis; add verifier-injection (Yi 2510.16657),
Livnat & Papadimitriou (CACM 2016) as the sex-as-computation precursor,
and the adjacent 2024-26 merge/LMC/multi-agent literature (Ainsworth,
Pari, Zhou, Cao, Sharma, Hu, Kozodoi, Li & Shen, Harris, Chen, Tanaka).

arXiv package (paper/arxiv/): md2tex.py — a small block-based
Markdown->LaTeX converter keeping the Markdown as source of truth —
main.tex, generated body.tex, 3 vector figures; builds clean under
tectonic (20 pp; pdflatex hint guarded for arXiv); ARXIV-SUBMISSION.md
carries categories, license note, and a <=1,920-char abstract. 149 tests
green.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BkRLcc18rwT2Lysu6PbG7v

paper/arxiv/main.tex

@@ -0,0 +1,35 @@
+% arXiv preprint — built with tectonic (XeLaTeX); arXiv's pdflatex also compiles it (all packages
+% standard, unicode restricted to inputenc-safe chars). Body is generated from the Markdown source of
+% truth by md2tex.py; edit paper/the-evolution-of-sex-for-ai.md, re-run the converter, rebuild.
+% arXiv pdflatex hint; skipped under XeTeX/tectonic (whose \pdfoutput would misdirect hyperref).
+\ifdefined\XeTeXversion\else\ifdefined\pdfoutput\pdfoutput=1\fi\fi
+\documentclass[11pt]{article}
+
+\usepackage[a4paper, margin=1.05in]{geometry}
+\usepackage{graphicx}
+\usepackage{amsmath, amssymb}
+\usepackage[hidelinks]{hyperref}
+\usepackage{microtype}
+
+\setlength{\parskip}{0.35em}
+
+\title{\textbf{The Evolution of Sex for Artificial Intelligence}\\[0.6em]
+\large A population-genetic control theory for societies of agents that reproduce, recombine,
+and stay open-ended}
+\author{Giorgio F.\ Gilestro\\[0.2em]
+\normalsize Department of Life Sciences, Imperial College London\\
+\normalsize \href{mailto:giorgio@gilest.ro}{giorgio@gilest.ro} \,\(\cdot\)\,
+\href{https://lab.gilest.ro}{lab.gilest.ro}}
+\date{}
+
+\begin{document}
+\maketitle
+
+\begin{center}
+\emph{A perspective, written from a geneticist's chair. Companion to a set of minimal, reproducible
+working models and a first language-model prototype (both built).}
+\end{center}
+
+\input{body}
+
+\end{document}