Converting an attachment to a note breaks links

### Description To reproduce: 1. Add an attachment to a note 2. Add a link to this attachment in note content 3. Convert attachment to note Observe: the link now points to "[missing attachment]", not to the new note. It would be good if the link is automatically updated. ### TriliumNext Version 0.95.0 ### What operating system are you using? Other Linux ### What is your setup? Local (no sync) ### Operating System Version NixOS 25.05 ### Error logs _No response_