ci: run Windows unit tests on every PR

Entire-Checkpoint: 01KYT2ERNWE2M35RVW7TNYD1QS

Author: peyton-alt

.github/workflows/ci.yml

@@ -67,16 +67,33 @@ jobs:
           E2E_CHECKPOINT_STORE: ${{ matrix.checkpoint_store }}
         run: mise run test:e2e:canary
 
+  test-windows:
+    runs-on: windows-latest
+    timeout-minutes: 10
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          ref: ${{ github.event.pull_request.head.sha || github.sha }}
+      - uses: actions/setup-go@b7ad1dad31e06c5925ef5d2fc7ad053ef454303e # v7.0.0
+        with:
+          go-version-file: go.mod
+      # Real-Windows tests must include Windows or MSYS in their top-level
+      # test name so this job selects them without running POSIX-only harnesses.
+      - name: Windows unit tests
+        run: go test ./cmd/entire/cli/... -run '(Windows|MSYS)' -count=1 -v
+
   test:
     runs-on: ubuntu-latest
     needs:
       - test-core
       - test-integration
       - test-canary
+      - test-windows
     if: ${{ always() }}
     steps:
       - name: Check dependencies
         run: |
           [ "${{ needs.test-core.result }}" = "success" ]
           [ "${{ needs.test-integration.result }}" = "success" ]
           [ "${{ needs.test-canary.result }}" = "success" ]
+          [ "${{ needs.test-windows.result }}" = "success" ]