Support auto-registration of service via Spring Boot

[rvervaek]

I noticed there is no auto-configuration present that would automatically register a Java Spring Boot app as a restate service in a restate server. In line with Spring Boot's 'convention over configuration philosophy' it would be convenient if if the sdk-spring-boot-starter library would include this functionality.

I have got some experience with writing Spring Boot auto-configuration libraries. However, I'm new to Restate and have probably not enough knowledge on how to implement this feature properly. I would be happy to contribute and give it a go if I had some 'technical requirements' to achieve this.

[slinkydeveloper]

I think such functionality doesnt fit restate push model, and has couple of non trivial problems (e.g. to register you need to know how to reach yourself).

We're working on a different approach of connection though for cloud, called tunnel client, where the service connects and establishes a permanent connection with the server when it starts. That will be surely integrated with our spring boot module.