[BUG] Renaming a Project from the Solution Explorer strips <ProjectReference> XML attributes

Describe the Issue

If you rename a .csproj from the Solution Explorer it will strip any XML attributes on the project reference. For example, if I rename a Source Generator that was referenced like this:

  <ItemGroup>
    <ProjectReference Include="SourceGen\SourceGenOld.csproj" OutputItemType="Analyzer" ReferenceOutputAssembly="false" />
  </ItemGroup>

It will replace it with this:

  <ItemGroup>
    <ProjectReference Include="SourceGen\SourceGenNew.csproj" />
  </ItemGroup>

Which will stop the Source Generator from running, in this scenario.

Steps To Reproduce

1. Open a solution with at least two projects
2. Have one project reference the other, and include XML attributes on the ProjectReference (for example a source generator that requires extra attributes)
3. Rename the referenced project from within the C# DevKit Solution Explorer
4. Notice the reference losing its XML attributes

Expected Behavior

The <ProjectReference> should not lose any of the XML attributes it had before the rename.

Environment Information

• Linux (Fedora 40)
• C# Dev Kit v1.4.29
• VS Code v1.89.0

Start by reproducing the rename from the C# Dev Kit Solution Explorer with a ProjectReference that has OutputItemType and ReferenceOutputAssembly attributes. Trace the rename operation and its project-reference update path; no source files or tests are named in the issue. Done means renaming the project changes only the Include path and preserves the existing XML attributes.