feat: add Linux ARM64 (aarch64) wheel builds

- Add *linux_aarch64 to cibuildwheel build glob
- Skip aarch64 tests under QEMU emulation (too slow for CI)
- Add [tool.cibuildwheel.linux] archs = ["x86_64", "i686", "aarch64"]

Generated with [Claude Code](https://claude.ai/code)
via [Happy](https://happy.engineering)

Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>

Author: 3 people

python/pyproject.toml

@@ -12,12 +12,13 @@ build-backend = "setuptools.build_meta"
 
 # Configuration for cibuildwheel
 [tool.cibuildwheel]
-build = "*linux_i686 *linux_x86_64 *win* *macos*"
+build = "*linux_i686 *linux_x86_64 *linux_aarch64 *win* *macos*"
 skip = "pp*"
 
 # skip test because lack of wheels for dependencies
 test-skip = """\
     *manylinux_i686 \
+    *manylinux_aarch64 \
     *musllinux* \
     *win32
     """
@@ -28,6 +29,9 @@ before-test = "pip install lifelines \"pandas<2.0.0\" scipy scikit-learn"
 # install pybind11 for cmake
 before-build = "pip install pybind11[global]"
 
+[tool.cibuildwheel.linux]
+archs = ["x86_64", "i686", "aarch64"]
+
 [tool.cibuildwheel.macos]
 archs = ["x86_64", "universal2", "arm64"]