Try caching downloads

.github/workflows/main.yml

@@ -17,8 +17,15 @@ jobs:
       - name: setup python
         uses: actions/setup-python@v5
         with:
-          python-version: 3.11 #install the python needed
+          python-version: 3.11.8
           cache: 'pip' # caching pip dependencies
+
+      - name: Cache download files
+        uses: actions/cache@v3
+        with:
+          path: /home/runner/.cache/helical
+          key: ${{ runner.os }}-downloads-${{ hashFiles('**/ci/download_all.py') }}
+
       - name: Install dependencies
         run: |
             python -m pip install --upgrade pip
@@ -29,9 +36,15 @@ jobs:
       - name: Download all files
         run: |
           python ci/download_all.py
+
+      - name: DEBUG
+        run: |
+          ls -ltr /home/runner/.cache/helical
+
+
       - name: Execute unittests
         run: |
-          pytest --cov-branch --cov=. ci/ --cov-report=term
+          pytest --cov-branch --cov=helical ci/ --cov-report=term
                
       # Does not seem to work but would be nice to have
       # - name: Pytest coverage comment