支持配置自动 compact 阈值 || Supports configuring automatic compact threshold

[vilicvane]

升级了 Allegro 结果发现套餐好像更不经用了，猜测是上下文太长即使算上 cache 也不划算，而 Kimi Code 只会在接近限制时触发压缩上下文，希望可以配置自动 compact 的阈值。

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After upgrading Allegro, I found that the package seems to be less durable. I guess the context is too long, even including cache, and it is not cost-effective. Kimi Code will only trigger the compression context when it is close to the limit. I hope the threshold for automatic compaction can be configured.

[vilicvane]

发现可以通过配置文件覆盖模型长度、调整保留上下文长度。让 kimi 自己改就行。

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It was found that the model length can be overridden and the retention context length adjusted through the configuration file. Just let kimi change it himself.