perf(test): optimize test suite speed and stability

packages/a2a-server/vitest.config.ts

@@ -4,13 +4,10 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-/// <reference types="vitest" />
 import { defineConfig } from 'vitest/config';
 
 export default defineConfig({
   test: {
-    include: ['**/*.{test,spec}.?(c|m)[jt]s?(x)'],
-    exclude: ['**/node_modules/**', '**/dist/**'],
     globals: true,
     reporters: ['default', 'junit'],
     silent: true,
@@ -18,29 +15,7 @@ export default defineConfig({
       junit: 'junit.xml',
     },
     coverage: {
-      enabled: true,
-      provider: 'v8',
-      reportsDirectory: './coverage',
-      include: ['src/**/*'],
-      reporter: [
-        ['text', { file: 'full-text-summary.txt' }],
-        'html',
-        'json',
-        'lcov',
-        'cobertura',
-        ['json-summary', { outputFile: 'coverage-summary.json' }],
-      ],
-    },
-    poolOptions: {
-      threads: {
-        minThreads: 8,
-        maxThreads: 16,
-      },
-    },
-    server: {
-      deps: {
-        inline: [/@google\/gemini-cli-core/],
-      },
+      enabled: false,
     },
   },
 });