Provide Public or Signed URLs for Images in "Copy as Markdown"

Hi team, Thank you for implementing the feature to generate absolute URLs for images in the "Copy as Markdown" function (#9852). This has improved the integration experience with other systems. However, I have encountered a new issue: Currently, the absolute image URLs generated by "Copy as Markdown" use the /api/attachments.redirect endpoint, for example: When I use these links in external applications or share the Markdown content, the images cannot be displayed unless the user is authenticated with Outline. Accessing these URLs without being logged in returns a 401 Unauthorized error. Expected behavior: It would be very helpful if there was a way to allow public (or token-based) access to images referenced in Markdown exports, so that they can be displayed in external systems without requiring Outline authentication. Use case: I am integrating Outline content into my own AI system. When the AI returns Markdown content, I want to ensure that…