Use --force when pruning cache

.github/workflows/test.yml

@@ -774,6 +774,23 @@ jobs:
             exit 1
           fi
 
+  test-cache-prune-force:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        with:
+          persist-credentials: false
+      - name: Setup uv
+        uses: ./
+        with:
+          cache-suffix: ${{ github.run_id }}-${{ github.run_attempt }}-test-cache-prune-force
+      - name: Create long running python script
+        run: |
+          echo 'import time' > __tests__/fixtures/uv-project/long-running.py
+          echo 'time.sleep(300)' >> __tests__/fixtures/uv-project/long-running.py
+      - run: uv run long-running.py &
+        working-directory: __tests__/fixtures/uv-project
+
   all-tests-passed:
     runs-on: ubuntu-latest
     needs:
@@ -813,6 +830,7 @@ jobs:
       - test-custom-manifest-file
       - test-absolute-path
       - test-relative-path
+      - test-cache-prune-force
     if: always()
     steps:
       - name: All tests passed