upload artifacts

 - NOTE: the report step will not always be attached to the test
   workflow - it may be attached to golangci-lint

   see:
   dorny/test-reporter#67
   https://github.com/orgs/community/discussions/24616

   a fork of this dorny/test-reporter has a solution at:
   phoenix-actions/test-reporting#21

.github/workflows/test.yaml

@@ -24,9 +24,16 @@ jobs:
       run: make common-deps
     - name: run tests
       run: make test-coverage
+    - name: Archive test and code coverage results
+      uses: actions/upload-artifact@v4
+      with:
+        name: results
+        path: |
+            test/*.xml
+            **/cover.out
     - name: report
-      uses: dorny/test-reporter@v1
       if: success() || failure()    # run this step even if previous step failed
+      uses: dorny/test-reporter@v1
       with:
         name: report
         path: test/*.xml