add github workflow for test coverage report check and comment

.github/workflows/test-coverage.yml

@@ -0,0 +1,64 @@
+name: Test and Coverage
+
+on:
+  pull_request:
+    branches:
+      - '**'
+
+jobs:
+  test-and-coverage:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: 1. Check out code
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: '0'
+
+      - name: 2. Set up Java
+        uses: actions/setup-java@v1
+        with:
+          java-version: 1.8
+
+      - name: 3. Build and Test with Coverage
+        run: ./gradlew clean build jacocoRootReport --no-daemon
+
+      - name: 4. Upload JaCoCo Report
+        uses: actions/upload-artifact@v4
+        with:
+          name: jacoco-report
+          path: build/reports/jacoco/test/jacocoTestReport.xml
+
+      - name: 5. Parse Coverage Results
+        id: coverage
+        run: |
+          thresholds=$(grep -oP '(?<=<counter type="INSTRUCTION" missed="\d+" covered=")\d+(?=")' build/reports/jacoco/test/jacocoTestReport.xml)
+          echo "THRESHOLDS=$thresholds" >> $GITHUB_ENV
+          violations=0
+          for module in coral-common coral-coralservice coral-hive coral-spark coral-trino coral-schema coral-pig coral-incremental coral-spark-plan coral-visualization; do
+            coverage=$(grep -A 1 "<package name=\"$module\"" build/reports/jacoco/test/jacocoTestReport.xml | tail -1 | awk '{print $3}')
+            threshold=$(grep "$module" <<< "$THRESHOLDS" | awk '{print $2}')
+            if [[ "$coverage" -lt "$threshold" ]]; then
+              violations=$((violations + 1))
+              echo "$module did not meet coverage requirement: $coverage (required: $threshold)"
+            else
+              echo "$module met coverage requirement: $coverage (required: $threshold)"
+            fi
+          done
+          echo "VIOLATIONS=$violations" >> $GITHUB_ENV
+
+      - name: 6. Post PR Comment with Coverage Report
+        uses: marocchino/sticky-pull-request-comment@v2
+        if: github.event_name == 'pull_request'
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          header: "JaCoCo Test Coverage Report"
+          message: |
+            ## Coverage Status by Module:
+            {{ steps.coverage.outputs }}
+
+            ${{ env.VIOLATIONS }} modules failed to meet coverage thresholds.
+
+      - name: 7. Fail if Coverage Violations Exist
+        if: env.VIOLATIONS != 0
+        run: exit 1