ci: split coverage report artifacts

Author: ben-laird

.github/workflows/ci.yml

@@ -49,7 +49,15 @@ jobs:
         uses: actions/upload-artifact@v4
         with:
           name: coverage-report
-          path: coverage
+          path: |
+            coverage/html
+            coverage/lcov.info
+
+      - name: Upload raw coverage files
+        uses: actions/upload-artifact@v4
+        with:
+          name: coverage-report-raw
+          path: coverage/*.json
 
   lint:
     name: Lint