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
@@ -21,20 +22,27 @@ jobs:
           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=5
+          export MAX_RETRIES=6
           export RETRY_COUNT=0
           echo "Attempting to download plans from ${PLANS_URL}"
           while [ $RETRY_COUNT -lt $MAX_RETRIES ]; do
-            curl -L -o /workspace/plans.zip "${PLANS_URL}" && break || true
-            echo "Plans file not available yet. Retrying in 10 seconds... ($((RETRY_COUNT + 1))/$MAX_RETRIES)"
+            # Download the file
+            curl -L -o /workspace/plans.zip "${PLANS_URL}" --fail --silent
+            # Validate if it is a valid ZIP
+            if unzip -t /workspace/plans.zip > /dev/null 2>&1; then
+              echo "Plans file downloaded and verified successfully."
+              break
+            else
+              echo "Invalid or corrupt plans file. Retrying in 10 seconds... ($((RETRY_COUNT + 1))/$MAX_RETRIES)"
               RETRY_COUNT=$((RETRY_COUNT + 1))
               sleep 10
+            fi
           done
-          if [ ! -f /workspace/plans.zip ]; then
-            echo "Failed to download plans file after $MAX_RETRIES attempts."
+          if [ $RETRY_COUNT -eq $MAX_RETRIES ]; then
+            echo "Failed to download a valid plans file after $MAX_RETRIES attempts."
             exit 1
           fi
-          echo "Plans file downloaded. Extracting..."
+          echo "Extracting plans..."
           unzip /workspace/plans.zip -d /workspace/unkin/terraform-nomad/plans
           echo "Plans file extracted successfully."