Add experimental Windows CI workflow

.github/workflows/ci-tests-windows.yml

@@ -0,0 +1,44 @@
+name: CI Tests (Windows)
+
+on: [ push, pull_request ]
+
+jobs:
+    tests:
+      strategy:
+          matrix:
+              flavour: ["windows-latest"]
+              include:
+                  - flavour: windows-latest
+                    runner: windows-latest
+                    python: '3.11'
+
+      runs-on: ${{ matrix.runner }}
+
+      steps:
+          - uses: actions/checkout@v4
+            with:
+              submodules: true
+
+          - name: Set up Python
+            uses: actions/setup-python@v5
+            with:
+                python-version: ${{ matrix.python }}
+                cache: pip
+
+          - name: Install test prerequisites
+            run: |
+              python -m pip install -U pip
+              python -m pip install \
+                pytest pytest-asyncio \
+                "psycopg[binary]!=3.3.0" \
+                python-dotenv pyyaml jinja2 psutil sqlalchemy
+
+          - name: Python unit tests (Windows subset)
+            run: |
+              python -m pytest \
+                test/python/utils \
+                test/python/config \
+                test/python/api/test_api_types.py \
+                test/python/api/search/test_query.py \
+                test/python/api/query_processing/test_regex_replace.py \
+                test/python/api/query_processing/test_split_japanese_phrases.py

.github/workflows/windows-ci.yml

@@ -0,0 +1,34 @@
+name: Windows CI (experimental)
+
+on:
+  pull_request:
+  push:
+
+jobs:
+  windows-smoke:
+    runs-on: windows-latest
+    continue-on-error: true #this is a smoke test (experimental); it won't block merges
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          submodules: true
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+          cache: pip
+          cache-dependency-path: |
+            packaging/nominatim-db/pyproject.toml
+            packaging/nominatim-api/pyproject.toml
+
+      - name: Install latest flake8
+        run: python -m pip install -U pip flake8
+
+      - name: Python linting
+        run: python -m flake8 src test/python test/bdd
+
+      - name: Compile Python sources (smoke)
+        run: python -m compileall src/nominatim_db src/nominatim_api nominatim-cli.py