Relationships between the CAF bits now in place

Rename the type field to kind, type is reserved

db/migrate/20230212065945_rename_type_to_kind_in_subprincipleitemgroup.rb

@@ -0,0 +1,4 @@
+class RenameTypeToKindInSubprincipleitemgroup < ActiveRecord::Migration[7.0]
+  def change
+  end
+end