Add download artifacts go CI

Author: titusz

.github/workflows/tests.yml

@@ -59,8 +59,19 @@ jobs:
           python -c "import iscc_core; iscc_core.conformance_selftest()"
           python -c "import iscc_core; print(iscc_core.turbo())"
 
-      - name: Collect Wheel
+      - name: Upload Wheel
         uses: actions/upload-artifact@v4
         with:
-          name: wheel-${{ matrix.os }}-${{ matrix.python-version }}
-          path: dist/*.whl
+          name: dist-${{ matrix.os }}-${{ matrix.python-version }}
+          path: dist
+
+  download:
+    needs: tests
+    runs-on: ubuntu-latest
+    steps:
+      - name: Download All Artifacts
+        uses: actions/download-artifact@v4
+        with:
+          pattern: dist-*
+          merge-multiple: true
+          path: dist