Add Python 3.14 to CI test matrix

https://claude.ai/code/session_01QsyBUkQCyboH9i46sS1gtL

Author: claude

.github/workflows/ci.yml

@@ -16,7 +16,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.11", "3.12", "3.13"]
+        python-version: ["3.11", "3.12", "3.13", "3.14"]
 
     steps:
       - uses: actions/checkout@v4