(#55) upgraded to Spring Boot 4.0.6, JDK 17, and zonky 2.8.0

[Eve953]

Describe your changes

-Changed Spring Boot to 4.0.6 and target compilation properties to JDK 17.
-Changed RELEASE_21 and '.getFirst()' to be compatible with JDK 17

• Changed embedded-database-spring-test (Zonky) to 2.8.0 to be compatible with the Spring Boot 4 / Jakarta EE namespace baseline.
• Changed the test environment's ddl-auto setting to create-drop to handle stricter Hibernate 6 type mappings during the integration tests

Issue ticket number and link

Resolves #55

Checklist before requesting a review

• I have performed a self-review of my code
• If it is a core feature, I have added thorough tests.
• I have made corresponding changes to the documentation
• I used the given Project Style Guide

[Eve953]

@Mom0aut I revised it to match JDK 25 now, I replaced all syntax as requested.

Context
Testing Modules fail to compile because of incompatibility with JDK 25.

Cause
Implicit annotation processing is restricted in newer JDK versions. The compilation plugin wasn't explicitly passing the core dynamic-relations artifact as an annotation processor path for the downstream modules' test scopes.

Solution
I updated the root pom.xml under maven-compiler-plugin to explicitly include the project's own processor artifact alongside Lombok inside , along with testing dependencies that needed modification (like updating to RELEASE_25)

[Eve953]

@Mom0aut the CI build failed bc the workflow is currently running on JDK 17. This update requires compiling with JDK 25 due to changes in how implicit annotation processing is handled for multi-module structures in modern Java versions. It builds and passes all 16 tests successfully on a JDK 25 environment locally.

[Mom0aut]

Hey @Eve953 i think you can just update the lines here for the workflow?
https://github.com/Mom0aut/DynamicRelations/blob/master/.github/workflows/maven-pr.yml#L22
and
https://github.com/Mom0aut/DynamicRelations/blob/master/.github/workflows/maven.yml#L21
then the action should run with the jdk 25 can you update them within your pr.

If not tell me i would update them on the main branch and you need to pull them over at your branch.

Thanks for your work 😄

[Eve953]

@Mom0aut I updated the yml files everything should be good to go :D

[Mom0aut]

@Eve953 looks good --> merged with master