Separate linting vs checking cruft into two pipelines

.github/workflows/lint.yaml

@@ -3,7 +3,7 @@ name: Lint
 on: [ push ]
 
 jobs:
-  build:
+  check_lint:
     runs-on: ubuntu-24.04
 
     steps:
@@ -28,5 +28,29 @@ jobs:
         run: sudo apt-get install --yes shellcheck
       - name: Lint
         run: poetry run lint --languages all --mode check
+      - name: Check Upstream Template
+        run: poetry run cruft check
+
+  check_upstream_template:
+    runs-on: ubuntu-24.04
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: pip cache
+        uses: actions/cache@v4
+        with:
+          path: ~/.cache/pip
+          key: lint-pip-${{ hashFiles('**/pyproject.toml') }}
+          restore-keys: |
+            lint-pip-
+      - name: Set up Python 3.12
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.12'
+      - name: Install Python dependencies
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install --upgrade poetry
+          poetry install
       - name: Check Upstream Template
         run: poetry run cruft check