Then you didnt turn off Auto deploy Hardpoints when the fire key is pressed. Or just assign heat sinks a hotkey. And no stations dont fire on you fire deploying hardpoints.When I tried it, hardpoints were deployed, and at least at some places, I would have to eject a heat sink when leaving the station. I expect to be destroyed immediately when doing that or to at least get a fine, and that would definitely make them scan me. There is no way that traffic monitoring wouldn't detect a hot heatsink right away and trace it back to the ship that ejected it. The ships aren't that close together that there could be any doubt about who ejected it. And there's nothing to keep them from to register every heat sink manufactured so they would always know whom it belongs to.
Turning on silent running brings the temperature up way too fast to use it and it's impossible to dock like that. So I abandoned heatsinks and silent running entirely because it turned out to be useless and dangerous. I can only wonder why there are so many passanger missions that are impossible to do.
Materials are way too scarce for wasting them on manufacturing anything.
This game isnt that complex, and this is far from impossible your overthinking it.