[Umbraco] Allow modification of Public Access settings on child nodes

### Which Umbraco version are you using? 17.2.1 ### Bug summary I have a parent node with Public Access set, and when I attempt to fine-tune it for a child node, I'm presented with "Error failed to load Public Access settings" <img width="791" height="225" alt="Image" src="https://github.com/user-attachments/assets/94208ac5-cb5e-43dc-a302-52760c9bf7c6" /> The endpoint returns: /umbraco/management/api/v1/document/f1f22c26-bbc3-4206-928a-6ee9c7d7b683/public-access ```json { "type": "Error", "title": "Entry not found", "status": 404, "detail": "The specified entry was not found.", "operationStatus": "EntryNotFound" } ``` This is the configuration on the parent node: <img width="767" height="388" alt="Image" src="https://github.com/user-attachments/assets/c3364361-1ba5-4aea-b305-641771fde4a0" /> ### Specifics See summary ### Steps to reproduce 1. Create a parent node and set public access configuration on it. 2. Create a child node under the parent node and