fail job if poetry lock needs to be updated

.github/workflows/test-suite.yml

@@ -74,10 +74,6 @@ jobs:
       - name: Install DRF version
         run: poetry run pip install --upgrade "djangorestframework==${{ matrix.drf-version }}"
 
-      - name: Check if poetry.lock needs to be updated
-        run: |
-          git diff --exit-code poetry.lock || echo "poetry.lock has changed, please update it" && exit 1
-
       - name: Show environment info
         run: |
           poetry run python --version
@@ -122,3 +118,34 @@ jobs:
 
       - name: Run pre-commit
         run: make run-hooks
+
+  lock-file-check:
+      name: Check poetry.lock for changes
+      runs-on: ubuntu-latest
+      needs: test
+      steps:
+        - uses: actions/checkout@v4
+
+        - uses: actions/setup-python@v5
+          with:
+            python-version: "3.11"
+
+        - name: Cache Poetry dependencies
+          uses: actions/cache@v4
+          with:
+            path: ~/.cache/pypoetry
+            key: ${{ runner.os }}-poetry-lock-check-${{ hashFiles('**/poetry.lock') }}
+            restore-keys: |
+              ${{ runner.os }}-poetry-lock-check-
+
+        - name: Setup Poetry
+          uses: abatilo/actions-poetry@v2
+          with:
+            poetry-version: "1.7.1"
+
+        - name: Install dependencies to check poetry.lock
+          run: poetry install --no-dev
+
+        - name: Check if poetry.lock needs to be updated
+          run: |
+            git diff --exit-code poetry.lock || echo "poetry.lock has changed, please update it" && exit 1