LTECH-405: Run tests in CI

[akos-hrvth]

Summary

Introduces a GitHub Actions CI workflow to automatically run tests for the spring-boot-starter branch, as part of the LTECH-405 initiative.

Changes

• Adds .github/workflows/test.yml, a new CI pipeline named Test that triggers on every push and supports manual dispatch via workflow_dispatch.

Workflow Details

• Runner: Self-hosted java-large runner.
• Concurrency: Configured to cancel in-progress runs on non-default branches, avoiding redundant executions.
• Steps:
  1. Checkout sources (pinned actions/checkout@v6.0.2).
  2. Configure AWS credentials via OIDC (aws-actions/configure-aws-credentials@v5.1.1) targeting the ci-base-access IAM role in eu-central-1 — likely needed to authenticate with AWS CodeArtifact for dependency resolution.
  3. Setup Java using Temurin distribution, with the version sourced from .sdkmanrc (actions/setup-java@v5.2.0).
  4. Run tests via the Gradle build action (gradle/gradle-build-action@v3.5.0), using the Gradle wrapper with build cache enabled.

Notes

• All actions are pinned to specific commit SHAs for supply chain security.
• CODEARTIFACT_AUTH_TOKEN is passed as a secret to authenticate private package resolution during the test run.

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[ctbur]

Do we need this step?