fix: add missing vitest.config.ts for driver-memory and service-ai

These packages were missing vitest configuration files, causing test failures in CI.
Added configs with proper path aliases for @objectstack/core and @objectstack/spec.

Co-authored-by: hotlong <50353452+hotlong@users.noreply.github.com>

Author: Claude

packages/plugins/driver-memory/vitest.config.ts

@@ -0,0 +1,17 @@
+// Copyright (c) 2025 ObjectStack. Licensed under the Apache-2.0 license.
+
+import { defineConfig } from 'vitest/config';
+import path from 'path';
+
+export default defineConfig({
+  test: {
+    globals: true,
+    environment: 'node',
+  },
+  resolve: {
+    alias: {
+      '@objectstack/core': path.resolve(__dirname, '../../core/src'),
+      '@objectstack/spec': path.resolve(__dirname, '../../spec/src'),
+    },
+  },
+});

packages/services/service-ai/vitest.config.ts

@@ -0,0 +1,17 @@
+// Copyright (c) 2025 ObjectStack. Licensed under the Apache-2.0 license.
+
+import { defineConfig } from 'vitest/config';
+import path from 'path';
+
+export default defineConfig({
+  test: {
+    globals: true,
+    environment: 'node',
+  },
+  resolve: {
+    alias: {
+      '@objectstack/core': path.resolve(__dirname, '../../../core/src'),
+      '@objectstack/spec': path.resolve(__dirname, '../../../spec/src'),
+    },
+  },
+});