manage cache, unlock uv sync

.github/workflows/pytest.yaml

@@ -17,6 +17,8 @@ jobs:
           - "3.12"
 
     runs-on: ubuntu-latest
+    env:
+      UV_PYTHON: ${{ matrix.python-version }}
     steps:
       - name: Check out the repository
         uses: https://github.com/RouxAntoine/checkout@v4.1.8
@@ -24,7 +26,17 @@ jobs:
           show-progress: true
       - name: Install uv
         uses: astral-sh/setup-uv@v7
+      - name: Restore uv cache
+        uses: actions/cache@v4
+        with:
+          path: /tmp/.uv-cache
+          key: uv-${{ runner.os }}-${{ hashFiles('uv.lock') }}
+          restore-keys: |
+            uv-${{ runner.os }}-${{ hashFiles('uv.lock') }}
+            uv-${{ runner.os }}
       - name: Install corrlib
-        run: uv sync --locked --all-extras --dev
+        run: uv sync --all-extras --dev
       - name: Run tests
         run: uv run pytest tests
+      - name: Minimize uv cache
+        run: uv cache prune --ci