11.10.0

[github-actions]

This is the release candidate for version 11.10.0.

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Note

Low Risk
Release metadata/docs-only changes (version and changelog) with no runtime code modifications.

Overview
Cuts the 11.10.0 release by bumping package.json version from 11.9.0 to 11.10.0.

Updates CHANGELOG.md with a new 11.10.0 section (noting the new ensureError utility) and adjusts compare links for Unreleased and the new tag.

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