Add integration test suite

[parisni]

in order to ease contributions and make the overall more robust would adding tests (eg; docker-compose local stack with postgres + fastapi api calls on test-client https://fastapi.tiangolo.com/tutorial/testing/) would be of interest ?

I can work on this

[tasn]

Yeah, that would definitely be of interest, though we have multiple test suits. Check out any of the client libraries (etebase-rs for one), they have a full integration test with the server.