Mirror the Beta article overflow repair

[jamiepratt]

Caution

AI-generated repair (OpenAI Codex). The repository owner explicitly authorized this focused fork repair for merge. The separate strict publication gate remains in #3 and still requires independent review.

Summary

• apply only the source/resource overflow repair on top of the fork Article 0 history
• add a fork-only repository guard so a push to fork main cannot deploy GitHub Pages
• leave the strict renderer and pull-request gate unmerged

Model validation

Not applicable. No model, scorer, evidence, or promotion decision changed.

Software tests

• changed Clojure sources pass clj-paren-repair
• affected Clay sources pass with JAVA_TOOL_OPTIONS=-Xss1m
• targeted Quarto render passed
• byte content matches the previously full-site-tested fork repair

Publication checks

• the corresponding source state passed the full 233-page Clay and Quarto workflow
• production deployment is owned by ClojureCivitas/clojurecivitas.github.io, not this fork

Separation

The strict publication gate remains unmerged in #3 for independent review.