ci: run PMD and Checkstyle in parallel with Maven

Replace GitHub Action PMD with Maven-based PMD job for version
consistency with ddk-parent/pom.xml. Add separate Checkstyle job.
Both run in parallel with maven-verify for faster feedback on
style violations.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: joaodinissf

.github/workflows/verify.yml

@@ -12,16 +12,22 @@ jobs:
         with:
           distribution: 'temurin'
           java-version: '21'
-      - name: PMD
-        uses: pmd/pmd-github-action@v2.0.0
-        id: pmd
+      - name: Set up Workspace Environment Variable
+        run: echo "WORKSPACE=${{ github.workspace }}" >> $GITHUB_ENV
+      - name: PMD Check
+        run: mvn pmd:pmd pmd:cpd pmd:check pmd:cpd-check -f ./ddk-parent/pom.xml --batch-mode --fail-at-end
+  checkstyle:
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v6
+      - uses: actions/setup-java@v5
         with:
-          version: '7.21.0'
-          rulesets: 'ddk-configuration/pmd/ruleset.xml'
-          analyzeModifiedFilesOnly: false
-      - name: Fail build if there are violations
-        if: steps.pmd.outputs.violations != 0
-        run: exit 1
+          distribution: 'temurin'
+          java-version: '21'
+      - name: Set up Workspace Environment Variable
+        run: echo "WORKSPACE=${{ github.workspace }}" >> $GITHUB_ENV
+      - name: Checkstyle Check
+        run: mvn checkstyle:checkstyle checkstyle:check -f ./ddk-parent/pom.xml --batch-mode --fail-at-end
   maven-verify:
     runs-on: ubuntu-24.04
     steps:
@@ -36,10 +42,10 @@ jobs:
           distribution: 'temurin'
           java-version: '21'
       - name: Set up Workspace Enviroment Variable
-        run: echo "WORKSPACE=${{ github.workspace }}" >> $GITHUB_ENV        
+        run: echo "WORKSPACE=${{ github.workspace }}" >> $GITHUB_ENV
       - name: Cache Maven dependencies
         uses: actions/cache@v5
-        with: 
+        with:
           path: /home/runner/.m2/repository
           key: ${{ runner.os }}-maven-0-${{ hashFiles('**/pom.xml') }}
       - name: Build with Maven  within a virtual X Server Environment