Please update the MCP to support a custom changelog date

Hi , Could you please update the Sleekplan MCP so create\changelog / update\changelog expose a settable publish/display date field? Right now there's no way to backdate an entry via the MCP: the displayed date is the immutable created timestamp, and passing a past scheduled value just hides the entry (enabled: 0) instead of dating it. This makes it impossible to script a historical import — every entry ends up dated today. Adding a date (or backdatable published\_at) parameter to the MCP changelog tools would fix this.