Handle Liquibase analytics feature

[rweisleder]

Liquibase 4.30 comes with an analytics feature that is enabled by default. (opt-out)

Since there is no Java API (at least in 4.30), Spring Boot would be unable to provide a property to disable that feature via application.properties. spring-projects/spring-boot#43067
The only way would be via environment variables or System.setProperty(..).

Presumably Liquibase 4.31 will provide a Java API to disable that feature, so that Spring Boot could create a property. liquibase/liquibase#6516

Liquibase 4.30 will be provided by Spring Boot 3.5.0 for the first time in May 2025. Depending on the release cycle it may include 4.31 directly.

I suggest we disable this feature. Alternatively, we could switch to Flyway to simplify the database setup for our participants. (SQL is easier for most of them than YAML)