- Add DDHH_JM_Roles class with add_roles() and remove_roles() methods
- Role 'ddhh_provider' (Anbieter) can edit/delete own job_offers only
- Jobs go to pending status (publish_job_offers: false)
- No access to regular posts/pages (edit_posts/edit_pages: false)
- Can upload files for logos
- Integrated with Activator and Deactivator hooks
