enhance(backend): improve chart engine

packages/backend/src/services/chart/charts/entities/test-unique.ts

@@ -0,0 +1,20 @@
+import Chart from '../../core';
+
+export const name = 'testUnique';
+
+export const schema = {
+	type: 'object' as const,
+	optional: false as const, nullable: false as const,
+	properties: {
+		foo: {
+			type: 'array' as const,
+			optional: false as const, nullable: false as const,
+			items: {
+				type: 'string' as const,
+				optional: false as const, nullable: false as const,
+			},
+		},
+	},
+};
+
+export const entity = Chart.schemaToEntity(name, schema);