Duplicate entries in reference panel when using Windows junction

Environment

• OS and Version: Windows 11 Enterprise 25H2
• VS Code Version: 1.137.0
• C/C++ Extension Version: 1.34.4
• If using SSH remote, specify OS of remote machine: N/A

Bug Summary and Steps to Reproduce

Bug Summary:
To workaround the Windows file path limit, I created a directory junction C:\projects that maps to a lengthy directory. I opened my project through this junction directory in another IDE, which generated a compile_commands.json using this junction directory.

When I search for references with the C/C++ plugin, it will show entries for the file in the junction directory as well as via the real path. So, I'm seeing everything duplicated.

Steps to reproduce:

1. Create a directory junction.
2. Generate a compile_commands.json that uses this directory path.
3. Load the folder in VSCode with C/C++ plugin (setup to use this compilation database).
4. Search for a reference to something.

Expected behavior: Only one of the junction path or real path is shown. Not both.

Configuration and Logs

N/A

Other Extensions

No response

Additional context

No response

Reproduce the issue with a Windows directory junction, a compile_commands.json using the junction path, and reference search in the C/C++ extension. Start by tracing how the extension reads compilation database paths and presents reference results; done means references reached through the junction and real path appear only once.