Harden canonical LaTeX scaffold for arXiv-safe, deterministic publication workflows

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This PR modernizes the paper.tex infrastructure to establish a semantic, publisher-agnostic baseline aligned with arXiv Submission System 1.5 constraints and future deterministic release transforms. It focuses on canonical document structure, metadata discipline, compatibility hardening, and accessibility-ready conventions before content iteration.

• Canonical document architecture

  • Refactored papers/reflector/paper.tex into a semantic, publication-oriented scaffold (title/author/abstract/TOC/section inputs/bibliography).
  • Re-enabled canonical abstract and explicit section wiring (problem_statement through conclusion) to preserve machine-readable structure.

• Metadata and scholarly structure hardening

  • Centralized paper metadata into macros (\papertitle, \paperauthor, ORCID/repository/status/date) and reused them in title block and PDF metadata.
  • Removed visual-layout-heavy/title-page hacks in favor of standard semantic LaTeX structure.

• arXiv compatibility posture

  • Standardized figure handling for PDFLaTeX-compatible formats via \graphicspath + \DeclareGraphicsExtensions{.pdf,.png,.jpg,.jpeg}.
  • Preserved robust biblatex+biber setup and removed wildcard bibliography inclusion (\nocite{*}) so references remain citation-driven.
  • Kept source publisher-agnostic (no arXiv-specific source hacks embedded into canonical files).

• Accessibility-aware preparation

  • Added explicit figure-caption/alt-text convention notes in scaffold comments to support future accessibility metadata mapping.
  • Retained semantic heading/section flow and Unicode-safe hyperlink metadata configuration.

• Template alignment for future papers

  • Applied the same hardening pattern to templates/paper/paper.tex so newly scaffolded papers start from the hardened baseline.
  • Improved template metadata placeholders (repository/ORCID guidance) for consistent authoring behavior.

Example of the new metadata pattern used across canonical and template scaffolds:

\newcommand{\papertitle}{Reflector: Reflective Development Systems for Recursive AI-Augmented Software Engineering}
\newcommand{\paperauthor}{Alan Szmyt}
\newcommand{\paperrepository}{https://github.com/egohygiene/papers}
\newcommand{\paperorcid}{0009-0008-5291-9795}
\newcommand{\paperorcidurl}{https://orcid.org/{\paperorcid}}

\usepackage[
  unicode=true,
  pdftitle={\papertitle},
  pdfauthor={\paperauthor}
]{hyperref}

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