Prepare azure.ai.agents 0.1.38-preview patch release metadata

[Copilot]

This prepares the next azure.ai.agents patch release by cutting 0.1.38-preview and promoting the current unreleased extension work into a dated release entry. The PR keeps the release-prep scope to extension metadata only.

• Release metadata

  • Bump cli/azd/extensions/azure.ai.agents/version.txt to 0.1.38-preview
  • Sync cli/azd/extensions/azure.ai.agents/extension.yaml to the same version

• Changelog rollup

  • Convert the current unreleased agent changes into a new 0.1.38-preview (2026-06-05) section
  • Normalize entries to the extension’s PR-link format
  • Capture the patch contents for:
    • hosted-agent policy manifest support
    • init-from-manifest subdirectory fix
    • salted resource group naming during init
    • Inspector auto-launch wait behavior

• Spell-check support

  • Add new contributor handles to .vscode/cspell-github-user-aliases.txt so the release entry stays clean under changelog spell-checking

# cli/azd/extensions/azure.ai.agents/extension.yaml
version: 0.1.38-preview

[trangevi]

@copilot enhance the changelog entry for PR #8521 to be more like the original text, while maintaining our consistent format

[Copilot]

@copilot enhance the changelog entry for PR #8521 to be more like the original text, while maintaining our consistent format

Updated in e72c004 to use wording that stays in the release-note format but tracks the original PR text more closely.

[Copilot]

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[github-actions]

📋 Prioritization Note

Thanks for the contribution! The linked issue isn't in the current milestone yet.
Review may take a bit longer — reach out to @rajeshkamal5050 or @kristenwomack if you'd like to discuss prioritization.

[trangevi]

/check-enforcer override