Harden Compress artifact step

Author: cbeauchesne

.github/workflows/system-tests.yml

@@ -176,7 +176,12 @@ jobs:
 
       - name: Compress artifact
         if: ${{ always() }}
-        run: tar -czvf artifact.tar.gz $(ls | grep logs)
+        run: |
+          if compgen -G "logs*/" > /dev/null; then
+            tar -czvf artifact.tar.gz logs*/
+          else
+            echo "No logs*/ found; skipping tar."
+          fi
 
       - name: Upload artifact
         uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
@@ -247,7 +252,12 @@ jobs:
 
       - name: Compress artifact
         if: ${{ always() }}
-        run: tar -czvf artifact.tar.gz $(ls | grep logs)
+        run: |
+          if compgen -G "logs*/" > /dev/null; then
+            tar -czvf artifact.tar.gz logs*/
+          else
+            echo "No logs*/ found; skipping tar."
+          fi
 
       - name: Upload artifact
         uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2