upload file size limit increased in server.ts

vitest.config.integration.ts

@@ -18,7 +18,9 @@ export default defineConfig({
   test: {
     name: 'integration',
     environment: 'node',
-    include: ['**/*.integration.test.ts'],
+    // The path must be specific. By default, Vitest doesn't look in `src`
+    // unless the pattern explicitly includes it.
+    include: ['src/**/*.integration.test.ts'],
     // This setup script starts the backend server before tests run.
     globalSetup: './src/tests/setup/integration-global-setup.ts',
     testTimeout: 15000, // Increased timeout for server startup and API calls.