Re #8476 - Added `to_dict` method to Subject, minor bugfix
Re #8476 - Certificate usages bugfix (?)
Re #8476 - Refactored the application; swagger is not used for code generation anymore, REST API is being implemented from scratch. Migration only, fixing tests.
Re #8472 - Fixed PrivateKey field assignment typo
Re #8471 - Merge implement DAO - source code