Fix test

tests/agent.test.ts

@@ -2,6 +2,10 @@ import { describe, it, expect } from "@jest/globals";
 import { graph } from "../src/enrichment_agent/graph.js";
 
 describe("Web Research Agent", () => {
+  beforeAll(() => {
+    process.env.TAVILY_API_KEY = "dummy";
+  });
+
   it("should initialize and compile the graph", () => {
     expect(graph).toBeDefined();
     expect(graph.name).toBe("ResearchTopic");