fix: resolve TypeScript errors in objectql engine datasource mapping

- Fix packageId access in getDriver method by using SchemaRegistry.getObjectOwner()
- ServiceObject type does not have packageId, it's in ObjectContributor
- Resolves build errors: "Property 'packageId' does not exist on type ServiceObject"

Agent-Logs-Url: https://github.com/objectstack-ai/framework/sessions/93e8e1d7-431c-457a-b084-4e5cc358b097

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

Author: Claude

packages/objectql/src/engine.ts

@@ -618,13 +618,14 @@ export class ObjectQL implements IDataEngine {
     }
 
     // 3. Check package's defaultDatasource
-    if (object?.packageId) {
-      const manifest = this.manifests.get(object.packageId);
+    const owner = SchemaRegistry.getObjectOwner(objectName);
+    if (owner?.packageId) {
+      const manifest = this.manifests.get(owner.packageId);
       if (manifest?.defaultDatasource && manifest.defaultDatasource !== 'default') {
         if (this.drivers.has(manifest.defaultDatasource)) {
           this.logger.debug('Resolved datasource from package manifest', {
             object: objectName,
-            package: object.packageId,
+            package: owner.packageId,
             datasource: manifest.defaultDatasource
           });
           return this.drivers.get(manifest.defaultDatasource)!;