Fix docs build failure by ensuring stable SCM versioning in CI workflow

.github/workflows/ci.yml

@@ -13,13 +13,25 @@ jobs:
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
 
       - name: Set up Python
         uses: actions/setup-python@v5
+        with:
+          python-version-file: ".python-version"
+
+      - name: Install uv
+        uses: astral-sh/setup-uv@v5
+        with:
+          enable-cache: true
 
       - name: Install dependencies
         run: pip install '.[dev,docs]'
 
+      - name: Check uv.lock is up to date
+        run: uv lock --check
+
       - name: Run ruff linter
         run: ruff check
 

.github/workflows/docs.yml

@@ -17,6 +17,13 @@ jobs:
     steps:
     - name: Checkout
       uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+
+    - name: Set up Python
+      uses: actions/setup-python@v5
+      with:
+        python-version-file: ".python-version"
 
     - name: Install uv
       uses: astral-sh/setup-uv@v5
@@ -28,7 +35,7 @@ jobs:
         set -eE
         set -o pipefail
 
-        uv sync --extra docs
+        uv sync --frozen --extra docs
 
     - name: Build documentation
       run: |