When adding a new attribute to a borrowed form, -BorrowMainAttribute
borrows the form's main attribute ("Объект") and all referenced object
attributes, tabular sections, and their transitive type dependencies.
Two modes: Form (default — only attributes referenced by form DataPath)
and All (all object attributes). Deep paths like Объект.A.B are resolved
transitively. Already-borrowed objects are not overwritten.
Also fixed: CommonPicture auto-borrow from AutoCommandBar, form-attribute
DataPath stripping (keep only Объект.* paths).
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>