feat: 增加go mod tidy测试

.github/workflows/backend-ci-cd.yml

@@ -45,6 +45,18 @@ jobs:
       - name: Download dependencies
         run: go mod download
 
+      - name: Check go.mod formatting
+        working-directory: backend
+        run: |
+          if ! go mod tidy --diff ; then
+            echo "::error::go.mod or go.sum is not properly formatted. Please run 'go mod tidy' locally and commit the changes."
+            exit 1
+          fi
+          if ! go mod verify ; then
+            echo "::error::go.mod or go.sum has unverified dependencies. Please run 'go mod verify' locally and commit the changes."
+            exit 1
+          fi
+
       - name: Generate Swagger.json
         run: |
           touch docs/swagger.json