Refactor Python setup and dependency installation

Updated Python setup and dependency installation process in GitHub Actions workflow.

Author: codeshell

.github/workflows/fetch-and-regenerate-lists.yml

@@ -23,12 +23,15 @@ jobs:
       uses: actions/setup-python@v7
       with:
         python-version: "3.14"
-        cache: "pip"
+        # cache: "pip"
         check-latest: false
     - name: Install dependencies
       run: |
-        # python -m pip install --upgrade pip
-        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+        if [ -f requirements.txt ]; then
+          python -m pip install -r requirements.txt --quiet
+        else
+          echo "No requirements.txt, skipping."
+        fi
     - name: Update external sources
       run: |
         python "./scripts/import_from_wiki_gg.py"