Simplify security scan to use go vet and npm audit

.github/workflows/ci-cd.yml

@@ -92,15 +92,10 @@ jobs:
       with:
         go-version: '1.24'
 
-    - name: Run Gosec Security Scanner
+    - name: Run go vet
-      uses: securecodewarrior/github-action-gosec@master
+      run: |
-      with:
+        cd backend
-        args: '-no-fail -fmt sarif -out results.sarif ./...'
+        go vet ./...
-
-    - name: Upload SARIF file
-      uses: github/codeql-action/upload-sarif@v3
-      with:
-        sarif_file: results.sarif
 
     - name: Run npm audit
       run: |