Split CI workflow into separate compile, test, and build jobs

[Copilot]

Restructures the GitHub Actions workflow from a single monolithic job into three sequential jobs for better visibility and fail-fast behavior.

Changes

• Workflow structure: Split into compile → test → build jobs using needs dependencies

  • compile: mvn -B compile
  • test: mvn -B test (skipped if compile fails)
  • build: mvn -B package + WAR artifact upload (skipped if test fails)

• Security: Added explicit permissions

  • Workflow-level: contents: read
  • Build job only: contents: write (for dependency graph submission)

• Artifacts: WAR file uploaded with 7-day retention

jobs:
  compile:
    name: Compile
    runs-on: ubuntu-latest
    steps:
      - name: Compile with Maven
        run: mvn -B compile --file pom.xml

  test:
    name: Test
    needs: compile
    # ...

  build:
    name: Build
    needs: test
    # ...

Each job failure immediately stops the pipeline, making it easier to identify which phase failed without scrolling through monolithic logs.

Original prompt

can you create sub task in action to be like compile test and build

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