fix(ci): make lint and windows tests reliable

Run golangci-lint v2 via go install to match the active Go toolchain, and remove Windows coverprofile generation that PowerShell resolves incorrectly as package .out.

Co-authored-by: Cursor <cursoragent@cursor.com>

.github/workflows/lint.yml

@@ -25,8 +25,8 @@ jobs:
       - name: Run go vet
         run: go vet ./...
 
+      - name: Install golangci-lint
+        run: go install github.com/golangci/golangci-lint/v2/cmd/golangci-lint@latest
+
       - name: golangci-lint
-        uses: golangci/golangci-lint-action@v6
-        with:
-          version: latest
-          args: --timeout 5m
+        run: golangci-lint run --timeout 5m

.github/workflows/test.yml

@@ -55,7 +55,7 @@ jobs:
 
       - name: Run tests with shuffle
         if: runner.os == 'Windows'
-        run: go test -shuffle=on -count=1 -coverprofile=coverage.out -covermode=atomic ./...
+        run: go test -shuffle=on -count=1 ./...
 
       - name: Upload coverage
         if: matrix.os == 'ubuntu-latest' && matrix.go == 'stable'