- Switch to EntityManagerInterface for EM uses
- Wrap EntityManager in close-resilient wrapper
- Close/clear/reopen EM with every request
- Rework tests to be em->clear() resilient.
Implement an upgrade of the codebase to use Slim Framework version 4, which includes the following changes:
- Updating to Slim version 4 and the corresponding AzuraCore updates.
- Making all objects PSR-7 Request/Response agnostic (and creating RequestHelper and ResponseHelper objects to interact with the PSR-7 Req/Resp objects).
- Moving to PHP-DI as a DI container and implementing its autowiring support.