更新内存驱动的 package.json，修正主入口和类型定义路径；重构 DataEngine 类，添加更新和删除方法，移除插件加载逻辑

Author: hotlong

examples/plugin-driver-memory/package.json

@@ -2,8 +2,8 @@
   "name": "@objectstack/plugin-driver-memory",
   "version": "0.0.1",
   "description": "Example: In-Memory Database Driver for ObjectStack",
-  "main": "dist/index.js",
-  "types": "dist/index.d.ts",
+  "main": "dist/src/index.js",
+  "types": "dist/src/index.d.ts",
   "scripts": {
     "build": "tsc",
     "dev": "tsc -w"

examples/server/src/index.ts

@@ -185,13 +185,8 @@ const port = 3004;
 
 (async () => {
   console.log('--- Starting ObjectStack Server ---');
-  try {
-    await loadPlugins();
-    console.log('--- Plugins Loaded ---');
-  } catch (err) {
-    console.error('Failed to load plugins:', err);
-  }
-
+  // Plugin loading is now handled by DataEngine constructor/init
+  
   console.log(`Server is running on http://localhost:${port}`);
 
   serve({

examples/server/src/kernel/engine.ts

@@ -85,6 +85,16 @@ export class DataEngine {
      return this.ql.insert(objectName, data);
   }
 
+  async update(objectName: string, id: string, data: any) {
+    this.ensureSchema(objectName);
+    return this.ql.update(objectName, id, data);
+  }
+
+  async delete(objectName: string, id: string) {
+    this.ensureSchema(objectName);
+    return this.ql.delete(objectName, id);
+  }
+
   private ensureSchema(name: string): ServiceObject {
     const schema = SchemaRegistry.getObject(name);
     if (!schema) throw new Error(`Unknown object: ${name}`);