Remove checkout action and use native workspace

.forgejo/workflows/deploy-cfn.yml

@@ -15,7 +15,14 @@ jobs:
       AWS_DEFAULT_REGION: ${{ secrets.LOWER }}
 
     steps:
-      - uses: actions/checkout@v4
+      - name: Verify workspace
+        run: |
+          pwd
+          ls -la
+          if [ ! -f "infra/hello-lambda.yml" ]; then
+            echo "infra/hello-lambda.yml not found in runner workspace"
+            exit 1
+          fi
 
       - name: Ensure AWS CLI
         run: |