Add integration with PostgreSQL

[mfvanek]

Create a custom schema https://www.baeldung.com/java-postgresql-create-schema-before-liquibase
and https://www.baeldung.com/jdbc-connect-to-schema

For SB3 see https://github.com/jdbc-observations/datasource-micrometer

dependencies {
    implementation("net.ttddyy.observation:datasource-micrometer-spring-boot")
}

jdbc:
  datasource-proxy:
    include-parameter-values: true
    query:
      enable-logging: true
      log-level: INFO
  includes: QUERY

[mfvanek]

See jdbc-observations/datasource-proxy#111
See also spring-projects/spring-boot#41213