Add main build validation for release workflow

.github/workflows/main-build.yml

@@ -256,6 +256,7 @@ jobs:
           aws s3 cp ./build/distributions/aws-opentelemetry-java-layer.zip s3://adot-main-build-staging-jar/adot-java-lambda-layer-${{ github.run_id }}.zip
 
   application-signals-e2e-test:
+    name: "Application Signals E2E Test"
     needs: [build, application-signals-lambda-layer-build]
     uses: ./.github/workflows/application-signals-e2e-test.yml
     secrets: inherit

.github/workflows/release-build.yml

@@ -25,6 +25,24 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v5
+
+      - name: Check main build status
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          WORKFLOW_ID=$(gh api repos/${{ github.repository }}/actions/workflows --jq '.workflows[] | select(.name=="Java Agent Main Build") | .id')
+          LATEST_RUN=$(gh api repos/${{ github.repository }}/actions/workflows/$WORKFLOW_ID/runs --jq '[.workflow_runs[] | select(.head_branch=="${{ github.ref_name }}")] | sort_by(.created_at) | .[-1] | {conclusion, status}')
+          STATUS=$(echo "$LATEST_RUN" | jq -r '.status')
+          CONCLUSION=$(echo "$LATEST_RUN" | jq -r '.conclusion')
+
+          if [ "$STATUS" = "in_progress" ] || [ "$STATUS" = "queued" ]; then
+            echo "Main build is still running (status: $STATUS). Cannot proceed with release."
+            exit 1
+          elif [ "$CONCLUSION" != "success" ]; then
+            echo "Latest main build on branch ${{ github.ref_name }} conclusion: $CONCLUSION"
+            exit 1
+          fi
+          echo "Main build succeeded, proceeding with release"
       - uses: actions/setup-java@c5195efecf7bdfc987ee8bae7a71cb8b11521c00 # v4.7.1
         with:
           java-version-file: .java-version