[Question]: imessage ACL 配置

## Question or topic

[What would you like to ask or discuss?]
imessage channel 会有个尴尬的问题，广告商给你发消息，CoPaw 默认配置会导致 CoPaw 也会回复 广告商（存在安全风险）。

## Context

[Relevant setup: CoPaw version, channel, skill, or use case. This helps others answer.]

## Tried so far

[Optional: what you already tried or read (docs, issues, etc.).]

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