Update UnbrandedGeneratorVersion to 1.0.0-alpha.20251007.1

[azure-sdk]

This PR updates the UnbrandedGeneratorVersion property in eng/Packages.Data.props and the @typespec/http-client-csharp dependency in eng/packages/http-client-csharp/package.json to version 1.0.0-alpha.20251007.1.

Details

• TypeSpec commit that triggered this PR: microsoft/typespec@5aa2a61

Changes

• Updated eng/Packages.Data.props UnbrandedGeneratorVersion property
• Updated eng/packages/http-client-csharp/package.json dependency version
• Ran npm install to update package-lock.json
• Ran eng/packages/http-client-csharp/eng/scripts/Generate.ps1 to regenerate test projects
• Generated emitter-package.json artifacts using tsp-client

This is an automated PR created by the TypeSpec publish pipeline.

[Copilot]

Pull Request Overview

This PR updates the UnbrandedGeneratorVersion to version 1.0.0-alpha.20251007.1 across the Azure SDK repository as part of an automated update triggered by a TypeSpec commit.

• Updated package dependency versions from 1.0.0-alpha.20251006.2 to 1.0.0-alpha.20251007.1
• Synchronized version references across configuration files and package manifests
• Included regenerated artifacts following the version update

Reviewed Changes

Copilot reviewed 3 out of 5 changed files in this pull request and generated no comments.

File	Description
eng/packages/http-client-csharp/package.json	Updated @typespec/http-client-csharp dependency version
eng/http-client-csharp-emitter-package.json	Updated @typespec/http-client-csharp dependency version
eng/Packages.Data.props	Updated UnbrandedGeneratorVersion property

Files not reviewed (2)

• eng/http-client-csharp-emitter-package-lock.json: Language not supported
• eng/packages/http-client-csharp/package-lock.json: Language not supported