feat: Publish test coverage summaries to PRs (#513)

packages/server/vitest.config.ts

@@ -0,0 +1,28 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { defineConfig } from 'vitest/config';
+
+export default defineConfig({
+  test: {
+    reporters: ['default', 'junit'],
+    outputFile: {
+      junit: 'junit.xml',
+    },
+    coverage: {
+      provider: 'v8',
+      reportsDirectory: './coverage',
+      reporter: [
+        ['text', { file: 'full-text-summary.txt' }],
+        'html',
+        'json',
+        'lcov',
+        'cobertura',
+        ['json-summary', { outputFile: 'coverage-summary.json' }],
+      ],
+    },
+  },
+});