fix: minimal CI - just run tests

.gitea/workflows/ci.yml

@@ -19,15 +19,12 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: '3.11'
-          cache: 'pip'
 
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install -e ".[dev]"
+          pip install pytest
+          pip install -e .
 
       - name: Run tests
         run: pytest tests/ -v --tb=short
-
-      - name: Check code formatting
-        run: ruff check env_pro/