chore: update @azure/identity to v4.13.1

[Copilot]

Bumps the @azure/identity transitive dependency from 4.13.0 → 4.13.1 via npm update.

Context

@azure/identity is not a direct dependency in any package.json in this repo — it is pulled in transitively by @microsoft/vscode-azext-azureauth (^4.13.0) and @vscode/vsce (^4.1.0). Neither the root package.json nor api/package.json declare it directly, so only package-lock.json changes.

Changes

• package-lock.json — updated resolved versions:

Package	Before	After
@azure/identity	4.13.0	4.13.1
@azure/msal-browser	4.28.1	5.6.2
@azure/msal-node	3.8.6	5.1.1
@azure/msal-common	15.14.1	16.4.0

Note: @azure/msal-node v5.x raises its minimum Node.js engine requirement to >=20. Node 20 is the current LTS and is satisfied by this repo's CI environment.

Original prompt

Update the @azure/identity npm package to the latest version across all package subdirectories in this repository. Check every subdirectory that has its own package.json for usage of @azure/identity. Update it wherever it appears as a dependency or devDependency. Run the existing test suite and build to verify nothing is broken. Summarize all changes in the PR description, listing which subdirectories were updated.

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