[v4] Feature Request: Allow Nested Resource to Support Multiple Parent Resources

[thaqebon]

Problem:

If the same nested resource (like CommentResource) is used across multiple parent types (PostResource, VideoResource, PhotoResource), we are forced to duplicate the nested resource logic for each parent.

I understand that we can point all of them to one schema and table, but we still need to create and maintain separate resource classes and pages for each parent. This leads to repetitive code and higher maintenance complexity.