DO NOT MERGE: Test Python 3.14

Author: cclauss

.github/workflows/build.yml

@@ -16,7 +16,7 @@ jobs:
           cache-dependency-glob: uv.lock
       - uses: actions/setup-python@v5
         with:
-          python-version: 3.13
+          python-version: 3.14
           allow-prereleases: true
       - run: uv sync --group=test
       - name: Run tests