Audit trail on objects
| Column | Type | References | Comments |
| id | Integer | Primary key | |
| vdb_id | Integer | ||
| object_id | Integer | Object ID | |
| object_type | Integer | Object type | |
| object_name | String | Object name (only present for deleted objects) | |
| project_id | Integer | db_project.id | Project ID (only present for deleted objects) |
| user_id | Integer | db_person.id | User ID |
| created | Date | Date | |
| event_code | String | Event code | |
| xml_string | String | Differences in case of an edit event | |
| message | String | Additional message |