feat: check if zip file is valid

- test the zip file to ensure its valid

.gitea/workflows/deploy.yaml

@@ -1,6 +1,7 @@
 name: Deploy
 
 on:
+  pull_request:
   push:
     branches:
       - master
@@ -16,11 +17,38 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v3
 
-      - name: Download Build Artifacts
-        uses: actions/download-artifact@v3
-        with:
-          name: plans
-          path: /workspace/unkin/terraform-nomad/plans
+      - name: Download Artifacts
+        run: |
+          mkdir -p /workspace/unkin/terraform-nomad/plans
+          export RUN_ID=$((GITHUB_RUN_NUMBER - 1))
+          export PLANS_URL="https://git.query.consul/${GITHUB_REPOSITORY}/actions/runs/${RUN_ID}/artifacts/plans"
+          export MAX_RETRIES=6
+          export RETRY_COUNT=0
+          echo "Attempting to download plans from ${PLANS_URL}"
+          while [ $RETRY_COUNT -lt $MAX_RETRIES ]; do
+            # Download the file
+            curl -L -o /workspace/plans.zip "${PLANS_URL}"
+            # Validate if it is a valid ZIP
+            if unzip -t /workspace/plans.zip > /dev/null 2>&1; then
+              echo "Plans file downloaded and verified successfully."
+              break
+            else
+              echo "Invalid or corrupt plans file. Retrying in 10 seconds... ($((RETRY_COUNT + 1))/$MAX_RETRIES)"
+              RETRY_COUNT=$((RETRY_COUNT + 1))
+              sleep 10
+            fi
+          done
+          if [ $RETRY_COUNT -eq $MAX_RETRIES ]; then
+            echo "Failed to download a valid plans file after $MAX_RETRIES attempts."
+            exit 1
+          fi
+          echo "Extracting plans..."
+          unzip /workspace/plans.zip -d /workspace/unkin/terraform-nomad/plans
+          echo "Plans file extracted successfully."
+
+      - name: Show Plans
+        run: |
+          find /workspace -type f -name "*.plan"
 
       - name: Install Packages
         run: |