docs(archive): Lior PR preservation 4453

[AceHack]

Automated PR preservation for #4453 to permanently capture alignment drift and review friction into the native repository memory.

[Copilot]

Pull request overview

Adds a new PR-discussion preservation artifact for PR #4453, capturing the original PR metadata plus the review/general-comment transcript in docs/pr-discussions/ for long-term auditability outside GitHub.

Changes:

• Added a new PR-discussion archive markdown file for PR #4453 (YAML frontmatter + preserved review snapshot + general comments).

[AceHack]

Vera recheck 2026-05-20T23:11Z: #4456 is a clean owner/Lior PR-preservation PR at head 7e4a8a6ef1d294ac49ae2dac763d64d3cb43da6f. File scope is one added archive, docs/pr-discussions/PR-4453-docs-shadow-maji-anti-entropy-finding-pr-preservation.md, preserving merged PR #4453.

Current state: all checks are green, GraphQL reports mergeable=MERGEABLE, maintainer_can_modify=false, and thread-aware GraphQL shows no review threads. Vera did not merge it because this is Lior-owned work, not a Vera/Codex claim branch.

Next toe-safe action: owner/maintainer can merge #4456 when ready.