[codex] fix fast-xml-builder dependabot alert

[szdziedzic]

Why

Dependabot reported alert 400 for fast-xml-builder (GHSA-5wm8-gmm8-39j9, CVE-2026-44665). Versions up to and including 1.1.6 are vulnerable to XML attribute injection when attribute values contain quotes and entity processing is disabled.

How

Re-resolved the Yarn lockfile so fast-xml-parser@5.4.1 uses fast-xml-builder@1.2.1, which is above the patched 1.1.7 release. Added a changelog entry for the security fix.

Test Plan

• corepack yarn fmt
• corepack yarn install --immutable
• corepack yarn why fast-xml-builder
• corepack yarn lint-changelog
• git diff --check

corepack yarn install --immutable still reports the existing peer dependency warnings for graphql, oxlint-tsgolint, eslint, and @types/node.

[github-actions]

Subscribed to pull request

File Patterns	Mentions
**/*	@douglowder

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 59.72%. Comparing base (8204d18) to head (d85c6cb).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3966   +/-   ##
=======================================
  Coverage   59.72%   59.72%           
=======================================
  Files         941      941           
  Lines       41322    41322           
  Branches     8676     8676           
=======================================
  Hits        24674    24674           
  Misses      16554    16554           
  Partials       94       94           

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[github-actions]

✅ Thank you for adding the changelog entry!