Re #8473 - Fixed minor typo in certificate_service.py
Re #8472 - Added a parameter to the craete_sscrt method in CryptographyService in order to be able to specify tha number of days for which the generated certificate will be valid.
Re #8472 - Added missing docstrings to KeyService and CertificateService classes
Re #8472 - Implemented delete_certificate method in CertificateService and added a test validating it
Re #8472 - Added get_chain_of_trust method documentation and comments
Re #8472 - Implemented get_chain_of_trust method and added an integration test validating it
Added return type specification to read_all method in CertificateRepository
Re #8472 - Implemented get_certificates method and added an integration test validating it
Added fixtures providing a unique DB connection for each test
Re #8472 - Implemented create_end_cert method and added an integration test validating it
Re #8472 - Added the ability to pass usage dictionary to create_ca and create_root_ca methods via optional parameter
Re #8472 - Implemented create_ca method in CertificateService and added test verifying this method's validity
Re #8472 - Implemented get_certificate method in CertificateService and added a test testing this method
Re #8472 - Finished implementation of create_root_ca method in CertificateService
Re #8472 - WIP commit of adding a method capable of parsing a Subject from a cert PEM