ci: migrate test-summary job from ubuntu-latest to debian runner

- Updated cli-level1-tests.yml test-summary job runs-on from ubuntu-latest to debian
- Aligns with repository-wide standardization to debian runner label
- Completes migration of all workflow jobs to consistent runner configuration

.gitea/workflows/cli-level1-tests.yml

@@ -128,7 +128,7 @@ jobs:
         retention-days: 7
         
   test-summary:
-    runs-on: ubuntu-latest
+    runs-on: debian 
     needs: test-cli-level1
     if: always()