It doesn't matter if court was adjourned, she was still at work and performing her official duties. In particular she asked the ICE agents if they had a
judicial warrant and was told no, it was
administrative. A federal judicial warrant clearly outranks a local judge and it would be fine to arrest her if she defied it. It is not clear that an order from the executive branch does the same. That doesn't mean local judges are immune from federal prosecution (e.g. corruption charges if someone takes money to rule favorably), but there is a fairly high bar, I don't think her behavior even comes close to probable cause for obstruction of justice or shielding an undocumented immigrant.
The reason every other administration besides Trump refused to go into local courthouses to deport people wasn't about "whether people should be safe from immigration enforcement," it was about separation of powers.