`code-insiders chat -a <file> <message>` doesn't seem to attach a file

[Tyriar]

While verifying #253029

Running code-insiders chat --add-file .\README.md hi there in the terminal results in this:

I was expecting C:\microsoft\vscode\README.md to be an attachment.

Version: 1.102.0-insider (user setup)
Commit: 00fa27e
Date: 2025-07-03T05:03:49.666Z
Electron: 35.6.0
ElectronBuildId: 11847422
Chromium: 134.0.6998.205
Node.js: 22.15.1
V8: 13.4.114.21-electron.0
OS: Windows_NT x64 10.0.26100

[Tyriar]

I had the file editor open at the time if that matters

[bpasero]

I cannot reproduce: