Ledgers database revisions are managed with liquibase. This module contains schema and data migrations.
When h2 profile is used all migrations are executed on application start using spring-liquibase integration.
With postgres you should apply migrations using maven liquibase plugin.
mvn liquibase:update
Change sets that insert test data should be marked with test context to make it possible to run only schema changes (e.g. mvn liquibase:update -Dliquibase.contexts=prod). Note that if you don't specify a context all migrations will be executed.