High CPU Usage (100%) from copilot-language-server-arm64 process

**Describe the bug**
The copilot-language-server-arm64 process is causing high CPU usage (100%) during normal operation in Xcode. I've taken a process sample which shows excessive CPU consumption by this language server process.

**Versions**
- Copilot for Xcode: 0.35.0 (Language Server Version: 1.321.0)
- Xcode: Version 16.3 (16E140)
- macOS: 15.5 (24F74)

**Steps to reproduce**
1. Start coding/editing in Xcode and ask questions to Copilot in Chinese characters
2. Check Activity Monitor
3. The copilot-language-server-arm64 process consistently shows ~100% CPU usage

**Screenshots**


**Logs**

[copilot-language-server-arm64.log](https://github.com/user-attachments/files/20473590/copilot-language-server-arm64.log)