402826ee3d
Mirror Form990LineId: add Form1099BoxId + Form1099BoxCode to all four category DTOs (response + request, group + sub); load a boxCodes lookup dictionary in GetAllAsync and project it; set/copy the field in CreateGroupAsync, UpdateGroupAsync, CreateSubCategoryAsync, and UpdateSubCategoryAsync. All 4 category-service unit tests pass. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>