refactor: Use type-based detection for ObjectQL plugin instead of symbol

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

Author: Copilot

OBJECTQL_PLUGIN_QUICKSTART.md

@@ -186,17 +186,17 @@ new ObjectQLPlugin(undefined, { env: 'prod' })  // Create with context
 
 ## Advanced
 
-### Symbol-Based Detection
+### Type-Based Detection
 
-ObjectQLPlugin uses a symbol for reliable detection:
+ObjectQLPlugin uses a `type` field for reliable detection:
 
 ```typescript
-import { OBJECTQL_PLUGIN_MARKER } from '@objectstack/runtime';
-
 // Check if a plugin is an ObjectQL plugin
-const isObjectQLPlugin = OBJECTQL_PLUGIN_MARKER in plugin;
+const isObjectQLPlugin = plugin && plugin.type === 'objectql';
 ```
 
+The plugin sets `type = 'objectql'` which aligns with the manifest schema that supports package types: 'app', 'plugin', 'driver', 'module', 'objectql', 'gateway', 'adapter'.
+
 ### Type Safety
 
 The kernel's `ql` property is typed as optional:

packages/runtime/src/index.ts

@@ -1,7 +1,7 @@
 // Export core engine
 export { ObjectQL, SchemaRegistry } from '@objectstack/objectql';
 export { ObjectStackKernel } from './kernel';
-export { ObjectQLPlugin, OBJECTQL_PLUGIN_MARKER } from './objectql-plugin';
+export { ObjectQLPlugin } from './objectql-plugin';
 export { ObjectStackRuntimeProtocol } from './protocol';
 
 export * from './types';

packages/runtime/src/kernel.ts

@@ -1,6 +1,5 @@
 import { ServiceObject } from '@objectstack/spec/data';
 import { SchemaRegistry, ObjectQL } from '@objectstack/objectql';
-import { OBJECTQL_PLUGIN_MARKER } from './objectql-plugin';
 
 /**
  * ObjectStack Kernel (Microkernel)
@@ -15,10 +14,10 @@ export class ObjectStackKernel {
   constructor(plugins: any[] = []) {
     this.plugins = plugins;
 
-    // Check if any plugin provides ObjectQL via the plugin marker
-    // This is more robust than string matching on name
+    // Check if any plugin provides ObjectQL via type: 'objectql'
+    // This aligns with the manifest schema that supports objectql as a package type
     const hasObjectQLPlugin = plugins.some(p => 
-      p && typeof p === 'object' && OBJECTQL_PLUGIN_MARKER in p
+      p && typeof p === 'object' && p.type === 'objectql'
     );
 
     if (!hasObjectQLPlugin) {

packages/runtime/src/objectql-plugin.ts

@@ -19,6 +19,7 @@ export const OBJECTQL_PLUGIN_MARKER = Symbol('objectql-plugin');
  */
 export class ObjectQLPlugin implements RuntimePlugin {
   name = 'com.objectstack.engine.objectql';
+  type = 'objectql' as const;
 
   // Mark this as an ObjectQL plugin for reliable detection
   readonly [OBJECTQL_PLUGIN_MARKER] = true;