feat: configure dual-driver setup for Vercel - Turso for sys namespace, Memory for apps

Agent-Logs-Url: https://github.com/objectstack-ai/framework/sessions/b0cabda0-dbb2-41c2-8ae6-47f8e3e6cabc

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

Author: Claude

apps/server/server/index.ts

@@ -13,6 +13,7 @@
 import { ObjectKernel, DriverPlugin, AppPlugin } from '@objectstack/runtime';
 import { ObjectQLPlugin } from '@objectstack/objectql';
 import { TursoDriver } from '@objectstack/driver-turso';
+import { InMemoryDriver } from '@objectstack/driver-memory';
 import { createHonoApp } from '@objectstack/hono';
 import { AuthPlugin } from '@objectstack/plugin-auth';
 import { SecurityPlugin } from '@objectstack/plugin-security';
@@ -62,7 +63,11 @@ async function ensureKernel(): Promise<ObjectKernel> {
             // Register ObjectQL engine
             await kernel.use(new ObjectQLPlugin());
 
-            // Database driver - Turso (remote mode for Vercel)
+            // Register Memory driver (default for CRM, Todo, BI apps)
+            const memoryDriver = new InMemoryDriver();
+            await kernel.use(new DriverPlugin(memoryDriver, 'memory'));
+
+            // Register Turso driver (for sys namespace)
             const tursoUrl = process.env.TURSO_DATABASE_URL;
             const tursoToken = process.env.TURSO_AUTH_TOKEN;
 
@@ -76,7 +81,19 @@ async function ensureKernel(): Promise<ObjectKernel> {
                 // Remote mode - no local sync needed for Vercel
             });
 
-            await kernel.use(new DriverPlugin(tursoDriver));
+            await kernel.use(new DriverPlugin(tursoDriver, 'turso'));
+
+            // Configure datasource mapping: sys namespace → Turso, everything else → Memory
+            const ql = kernel.getService('objectql');
+            if (ql && typeof ql.setDatasourceMapping === 'function') {
+                ql.setDatasourceMapping([
+                    // System objects (sys namespace) use Turso for persistent storage
+                    { namespace: 'sys', datasource: 'turso' },
+                    // All other objects use Memory driver as default
+                    { default: true, datasource: 'memory' },
+                ]);
+                console.log('[Vercel] Datasource mapping configured: sys → turso, default → memory');
+            }
 
             // Load app manifests (BEFORE plugins that need object schemas)
             await kernel.use(new AppPlugin(CrmApp));