feat(sdk): add Python 3.14 support

- Extend SDK metadata and CI matrices
- Refresh dependencies and compatibility fixtures
- Add regression coverage and changelog fragment

.github/workflows/sdk-code-quality.yml

@@ -30,6 +30,7 @@ jobs:
           - '3.11'
           - '3.12'
           - '3.13'
+          - '3.14'
 
     steps:
       - name: Harden Runner