lock pdm tests

.github/workflows/main.yaml

@@ -15,19 +15,22 @@ jobs:
     steps:
       - name: Check out source code
         uses: actions/checkout@v4
-        with:
-          fetch-depth: 0
+
       - name: Set up PDM
         uses: pdm-project/setup-pdm@v4
+
+      - name: Re-lock PDM dependencies
+        run: pdm lock -d
+
       - name: Install dependencies
-        run: |
-          pdm install
+        run: pdm install
+
       - name: Run tests
-        run: |
-          pdm run test
+        run: pdm run test
+
       - name: Run lints
-        run: |
-          pdm run lint
+        run: pdm run lint
+
       - name: Run doc tests
         run: pdm run test-docs
 
@@ -50,6 +53,7 @@ jobs:
         with:
           fetch-depth: 0
           path: chipflow-lib
+
       - name: Check out chipflow-examples
         uses: actions/checkout@v4
         with:
@@ -63,12 +67,18 @@ jobs:
           python-version: "3.10"
           cache: true
           cache-dependency-path: "./**/pyproject.toml"
+
+      - name: Re-lock PDM dependencies
+        working-directory: ./chipflow-examples
+        run: pdm lock -d
+
       - name: Install dependencies
         working-directory: ./chipflow-examples
         run: |
           pdm install
           pdm run python -m ensurepip
           pdm run python -m pip install -e ../chipflow-lib
+
       - name: Run tests
         working-directory: ./chipflow-examples/minimal
         run: |
@@ -86,6 +96,7 @@ jobs:
         with:
             fetch-depth: 0
             path: chipflow-lib
+
       - name: Check out chipflow-examples
         uses: actions/checkout@v4
         with:
@@ -99,12 +110,18 @@ jobs:
           python-version: "3.10"
           cache: true
           cache-dependency-path: "./**/pyproject.toml"
+
+      - name: Re-lock PDM dependencies
+        working-directory: ./chipflow-examples
+        run: pdm lock -d
+
       - name: Install dependencies
         working-directory: ./chipflow-examples
         run: |
           pdm install
           pdm run python -m ensurepip
           pdm run python -m pip install -e ../chipflow-lib
+
       - name: Run tests
         working-directory: ./chipflow-examples/minimal
         run: |