Add Windows builds to release and test workflows

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

Author: Andrey Golovanov

.github/workflows/release.yml

@@ -23,6 +23,8 @@ jobs:
             cibw_archs: "aarch64"
           - os: macos-latest
             cibw_archs: "universal2"
+          - os: windows-latest
+            cibw_archs: "AMD64"
 
     steps:
       - uses: actions/checkout@v4

.github/workflows/tests.yml

@@ -13,7 +13,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-22.04, macos-latest]
+        os: [ubuntu-22.04, macos-latest, windows-latest]
         python-version: ["3.11", "3.12", "3.13", "3.14"]
     steps:
       - uses: actions/checkout@v4
@@ -25,7 +25,11 @@ jobs:
           python -m pip install -U pip wheel
           python -m pip install -e .[dev]
       - name: Run CI checks (lint + C++/Python tests)
+        if: runner.os != 'Windows'
         run: make check-ci
+      - name: Run Python tests (Windows)
+        if: runner.os == 'Windows'
+        run: python -m pytest tests/py/ -v
 
   test-centos-stream-9:
     name: CentOS Stream 9 (py${{ matrix.python-version }})