add simplest handler for sqlite

fiori/server.js

@@ -0,0 +1,13 @@
+const cds = require('@sap/cds')
+cds.on('served', () => {
+  // register a simplified handler for tree table
+  // no filtering/searching/collapsing/expanding of nodes
+  if (cds.db.kind === 'sqlite') {
+    const { AdminService } = cds.services
+    AdminService.prepend(() => {
+      AdminService.on('READ', 'Genres', () => {
+        return SELECT.from('AdminService.Genres')
+      })
+    })
+  }
+})