Promote: adopt ptr727.Utilities HttpClientFactory

[ptr727]

Promotes to main the adoption of the shared ptr727.Utilities 4.0.7 HttpClientFactory / AssemblyInfo in place of the local copies.

• LanguageTagsCreate references ptr727.Utilities and deletes its local HttpClientFactory.cs / AssemblyInfo.cs.
• The download call uses Utilities.HttpClientFactory.GetClient(); the resilience pipeline and AOT-safe User-Agent come from the library.
• The library ILogger logging is wired via Utilities.LogOptions.SetFactory(...).

Verified: build clean, dotnet format style clean, 296 tests passing.

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.76%. Comparing base (adba4dc) to head (be1c95a).
⚠️ Report is 59 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #258   +/-   ##
=======================================
  Coverage   99.76%   99.76%           
=======================================
  Files          15       15           
  Lines      232994   232994           
  Branches      243      243           
=======================================
  Hits       232450   232450           
  Misses        462      462           
  Partials       82       82           

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[Copilot]

Pull request overview

Promotes to main the switch in LanguageTagsCreate from local implementations to the shared ptr727.Utilities package for HTTP client creation and shared assembly/logging utilities, reducing duplicated code in the codegen tool.

Changes:

• Replace the local LanguageTagsCreate HttpClientFactory with ptr727.Utilities.HttpClientFactory.
• Wire the shared ptr727.Utilities.LogOptions to the existing Serilog-backed ILoggerFactory.
• Remove the local HttpClientFactory.cs and AssemblyInfo.cs and add ptr727.Utilities 4.0.7 to central package versions.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
LanguageTagsCreate/Program.cs	Sets both ptr727.LanguageTags.LogOptions and ptr727.Utilities.LogOptions to the same ILoggerFactory.
LanguageTagsCreate/LanguageTagsCreate.csproj	Replaces direct resilience-related dependency usage with a ptr727.Utilities package reference.
LanguageTagsCreate/HttpClientFactory.cs	Removes the local resilience-enabled HttpClient factory implementation.
LanguageTagsCreate/CreateTagData.cs	Switches download stream acquisition to Utilities.HttpClientFactory.GetClient().
LanguageTagsCreate/AssemblyInfo.cs	Removes the local assembly metadata helper previously used by the old HTTP client factory.
Directory.Packages.props	Drops the now-unused resilience package version and adds ptr727.Utilities 4.0.7.