Migration to Litestar

[RobertRosca]

Moving to Litestar should be considered as it is very similar in feature sets/style to FastAPI, and provides a number of nice features, some of which are requirements (or at least potential requirements):

• Data stores/ORM
• Event queue (see API Event/Message Queue? #144 Ingesting Listener Kafka Messages? #145 )
• Better integration with Structlog