MC Admissions WordPress Backend 0.2.69

Agent application visibility and migration amendments backend.\n\n- Keeps agent case responses owner-scoped and shape-complete\n- Exposes submitted application fields, safe generated letters, intake-side attachments, and current permit status\n- Removes staff-only finance, migration, immigration, communication, assessment, and activity data from agent responses\n- Blocks agent access to staff-owned document streams and internal detail endpoints\n- Preserves full internal staff behavior