1. Added fallback mechanism to Event_File_Base to resolve string IDs from integers when views return partial data.\n2. Added 'a2pPIT_W28o' as a permanent regression test target.\n3. Hardened lu_file_purpose_id stripping.
1. Hardened all demo models to set non-string ID fields to None, ensuring full Vision Standard compliance.\n2. Added status_id_random to common field schema.\n3. Verified account_id availability in exhibit tracking.\n4. Added comprehensive E2E parity test suite for demo objects.\n5. Fixed NameError by importing root_validator.