Add a test for monitoring supported by new repo-core library.

[VolkerHartmann]

Add a test for /actuator/prometheus endpoint.

• Update to new version of repo-core

Summary by CodeRabbit

• New Features

  • Added integration tests to verify the Prometheus actuator endpoint is correctly exposed and returns expected metrics, while other actuator endpoints remain inaccessible.

• Chores

  • Upgraded multiple build dependencies and plugins for improved stability and security.
  • Updated Gradle wrapper and related scripts to newer versions.
  • Updated Docker-related GitHub Actions to newer versions for workflow improvements.

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Walkthrough

This update consists of dependency and plugin version upgrades in build and workflow files, Gradle wrapper updates, and the addition of a new integration test for the Prometheus actuator endpoint. No changes are made to exported or public entities except for the introduction of a new test class and methods.

Changes

File(s)	Change Summary
.github/workflows/docker-publish.yml	Updated Docker GitHub Actions to newer commit versions.
build.gradle	Upgraded versions of plugins and dependencies; no logic or scope changes.
gradle/wrapper/gradle-wrapper.properties	Updated Gradle distribution version from 8.12.1 to 8.14.3.
gradlew, gradlew.bat	Changed Gradle wrapper execution from classpath/main-class to executable JAR invocation; cleared CLASSPATH variable.
src/test/java/edu/kit/datamanager/repo/test/integration/ActuatorPrometheusTest.java	Added new integration test class for Prometheus actuator endpoint, with tests for endpoint exposure and metric presence.

Sequence Diagram(s)

sequenceDiagram
    participant TestClass as ActuatorPrometheusTest
    participant MockMvc
    participant SpringBootApp as Spring Boot App

    TestClass->>MockMvc: Send GET /actuator/prometheus
    MockMvc->>SpringBootApp: HTTP GET /actuator/prometheus
    SpringBootApp-->>MockMvc: 200 OK with Prometheus metrics
    MockMvc-->>TestClass: Response with metrics

    TestClass->>MockMvc: Send GET /actuator/{other}
    MockMvc->>SpringBootApp: HTTP GET /actuator/{other}
    SpringBootApp-->>MockMvc: 404 Not Found
    MockMvc-->>TestClass: 404 Response

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Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

Poem

A bunny hopped through code today,
Updating versions along the way.
Gradle wrappers, plugins new,
Docker actions freshened too!
With Prometheus now under test,
Metrics checked, endpoints addressed—
This rabbit’s work is simply the best! 🐇✨

✨ Finishing Touches

🧪 Generate unit tests

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch addMonitoring

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