Unreasonable rate limit reached quickly after updating to v1.0.29 (Pro+)

### Describe the bug

### Description

I use the Copilot CLI for software development and am a Pro+ subscriber. Today, after updating to v1.0.29, I encountered a rate limit warning after only a brief period of conversation and development. This completely halted my work and resulted in the unnecessary loss of my premium request.

This has happened multiple times now, rendering the tool practically unusable. If this extreme rate limiting is expected behavior going forward, I will have to cancel my subscription.

### Error Message

> Sorry, you've hit a rate limit that restricts the number of Copilot model requests you can make within a specific time period. Please try again in 2 minutes. Please review our Terms of Service (https://docs.github.com/site-policy/github-terms/github-terms-of-service).

### Environment

* **OS:** Windows 11
* **Tool:** Copilot CLI
* **Version:** v1.0.29
* **Subscription Tier:** Pro+

### Affected version

1.0.29

### Steps to reproduce the behavior

_No response_

### Expected behavior

_No response_

### Additional context

_No response_

首先，在 Windows 11 上使用 Copilot CLI v1.0.29 和 Pro+ 訂閱重現 rate-limit 警告，因為該 issue 沒有提供重現步驟或指定檔案。將簡短對話後的行為與預期的請求限制進行比較；當原因已確定，且過度的速率限制問題已解決或得到明確記錄時，即視為完成。

由索引模型根據 Issue 內容生成。