fix: Setup Python properly for Windows tests

Use actions/setup-python to ensure Python is properly configured in PATH
for pyo3-build-config. Revert vortex-python exclusion since Python will
now be available.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>
Signed-off-by: Joe Isaacs <[email protected]>

Author: joseph-isaacs

.github/workflows/ci.yml

@@ -434,6 +434,11 @@ jobs:
         shell: bash
         run: |
           choco install visualstudio2022buildtools --package-parameters "--add Microsoft.VisualStudio.Workload.VCTools --includeRecommended --passive" -y
+      - name: Setup Python (Windows)
+        if: matrix.os == 'windows-x64'
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
       - uses: ./.github/actions/setup-rust
         with:
           repo-token: ${{ secrets.GITHUB_TOKEN }}
@@ -442,7 +447,7 @@ jobs:
         with:
           tool: nextest
       - name: Rust Tests
-        run: cargo nextest run --locked --workspace --all-features --no-fail-fast --exclude bench-vortex --exclude vortex-python
+        run: cargo nextest run --locked --workspace --all-features --no-fail-fast --exclude bench-vortex
 
   build-java:
     name: "Java"