Publish now button on Embargoed project leads to 500 error


Also the user is able to edit Embargo projects, which should not be the case.

<img width="4512" height="2218" alt="Image" src="https://github.com/user-attachments/assets/70130fae-04f6-4f53-a321-bb96c5574ff4" />


<img width="5336" height="3050" alt="Image" src="https://github.com/user-attachments/assets/44222470-63c3-462c-9d26-f7b1800d7040" />