mscbot may not start FCP when using `@mscbot reviewed`

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One can use `@mscbot reviewed` to automatically check the box for themselves in an ongoing FCP status comment. The bot will also unconditionally ignore all comments and comment edits from itself.

When designing the `reviewed` command, it was incorrectly assumed that updating the status comment would then have the knock-on effect of starting FCP if enough ticks had happened. Instead, the edit is ignored as it comes from the bot.

A fix would simply involve manually calling `_process_status_comment_update_with_body` below https://github.com/matrix-org/mscbot-python/blob/fd6027708fd6ce08767556689470a6759c8af4ef/command_handler.py#L169-L172

从 command_handler.py 的第 169–172 行附近开始，跟踪已审查命令对正在进行的 FCP 状态评论的处理。确保机器人的状态评论更新得到处理，使 FCP 在发生足够次数的 ticks 后启动，然后使用项目的相关测试验证行为。

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