[JENKINS-50559] Authorization Folder property for Multibranch jobs

I would like to set up Authorization (Authorize Project plugin) for a Multibranch item. Setting up authorization at multibranch level is required to prevent branch projects to be able to build ANY project in the system.

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Originally reported by allan_burdajewicz, imported from: Authorization Folder property for Multibranch jobs

• status: Open
  
• priority: Major
  
• component(s): authorize-project-plugin
  
• label(s): authorization, folders, permissions, pipeline
  
• resolution: Unresolved
  
• votes: 19
  
• watchers: 22
  
• imported: 20260312-112651
  

I would like to set up Authorization (Authorize Project plugin) for a Multibranch item. Setting up authorization at multibranch level is required to prevent branch projects to be able to build ANY project in the system.

Start by reviewing how the Authorize Project plugin represents authorization for Multibranch items and how branch projects inherit permissions. Confirm the expected behavior for preventing branch projects from building arbitrary system projects, then identify the relevant implementation and test entry points. Done means authorization can be configured at the Multibranch level and the permission boundary is covered by tests.

Written by the indexing model from the issue text.