Exhaust Scrubber missing limestone import?

Issue description

as image

Reproduction steps

load a update 2 save and have this issue

Game version and build number

v0.7.1c

Operating system

Windows

Attachments

Captain of Industry_Saves_Save 2025-03-25, 16-38-02.save

You should attach a save file.

You should attach a save file.

thank you for reminding me, i have just uploaded save file

The summary is that adding/removing ports does not propagate to machines on load, and they retain the original set of ports. Fixing this would require checking if ports changed on load and if yes, rebuilding them. It's currently unclear what we want here. But this could be a bit of a dangerous fix in between updates.