ci: fix gl-sdk wheel missing glsdk.py and retag with platform

- Force-include glsdk/glsdk.py in the hatchling build hook. Hatchling
  respects .gitignore which excludes glsdk.py (UniFFI-generated), so
  the wheel was missing the Python bindings module entirely.
- Retag gl-sdk wheel from py3-none-any to the correct platform since
  it contains a native shared library (libglsdk.so/.dylib/.dll).
- Switch cfssl to prebuilt binaries, add --no-sync to uv run pytest.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: cdecker

libs/gl-sdk/hooks/libglsdk_force_include.py

@@ -20,4 +20,5 @@ def initialize(self, version, build_data):
                 lib_ext = ".so"
 
         shared_file = f"glsdk/libglsdk{lib_ext}"
-        build_data['force_include'][shared_file] = shared_file
+        build_data['force_include'][shared_file] = shared_file
+        build_data['force_include']['glsdk/glsdk.py'] = 'glsdk/glsdk.py'