Method cacheMessageSummary

src/context/storage/CacheStore.ts:115–126

* 缓存消息摘要

(sessionId: string, messages: ContextMessage[], summary: string)

   * 缓存消息摘要
   */
  cacheMessageSummary(sessionId: string, messages: ContextMessage[], summary: string): void {
    const key = `summary:${sessionId}:${messages.length}`;
    this.set(
      key,
      {
        summary,
        messageCount: messages.length,
        lastMessage: messages[messages.length - 1]?.timestamp || 0,
      },
      10 * 60 * 1000
    ); // 10分钟TTL
  }

  /**
   * 获取缓存的消息摘要