chore: update Copilot CLI to 1.0.82

[github-actions]

Automated weekly Copilot CLI package and documentation refresh.

• Package: 1.0.71 -> 1.0.82
• Rolling report: maintenance/copilot-cli/latest-package-update.md
• Subsystem review: maintenance/copilot-cli/latest-subsystem-review.md
• Subsystem/module candidates: 7
• Optional documentation agent ran: false

Validation completed before this PR was opened:

• native Copilot CLI install plus package/script syntax and version checks
• Astro build plus Markdown link, navigation, route, H1, and atlas-count checks
• extracted package artifacts are excluded from diff --check because upstream generated declarations may contain trailing spaces