Release v2.4.4

• new maven structure (parent pom, child pom's for each module)
• dependency upgrades:
  • spring-boot: 3.1.3 -> 3.1.4
  • maven-javadoc-plugin: 3.5.0 -> 3.6.0
  • flyway-core: 9.19.4 -> 9.22.2
  • unboudid-ldapsdk: 6.0.9 -> 6.0.10
  • hibernate-jpamodelgen: 6.2.7.Final -> 6.3.1.Final