Amazon Q v1.104.0 EPIPE Failure causing local Knowledge Base to not work

## Problem

After upgrading Amazon Q for VSCode to v1.104.0, I am unable to build a local knowledge base for providing Pinned Context.

## Steps to reproduce the issue

- Start VSCode
- Wait
- Get errors

## Expected behavior

To index local knowledge base and allow me to send Pinned Context beyond Active File or Prompts.

## System details (run `AWS: About` and/or `Amazon Q: About`)

- OS: Fedora Linux 42 in WSLv2 on Windows 11.
- Visual Studio Code version: v1.1.06.0
- AWS Toolkit version: v3.84.0
- Amazon Q version: v1.104.0 (also seen now in v1.101.0 and newer)

No source file, test, or entry point is identified. Start by reproducing the failure in VS Code with Amazon Q v1.104.0 or newer on the reported Fedora WSLv2 setup, then inspect the EPIPE error and the local knowledge-base indexing path. Done means the local knowledge base indexes successfully and Pinned Context works beyond the active file or prompts.

Written by the indexing model from the issue text.