test: migrate suites to e2e coverage layout

src/agents/tool-policy.conformance.e2e.test.ts

@@ -0,0 +1,13 @@
+import { describe, expect, test } from "vitest";
+import { TOOL_POLICY_CONFORMANCE } from "./tool-policy.conformance.js";
+import { TOOL_GROUPS } from "./tool-policy.js";
+
+describe("TOOL_POLICY_CONFORMANCE", () => {
+  test("matches exported TOOL_GROUPS exactly", () => {
+    expect(TOOL_POLICY_CONFORMANCE.toolGroups).toEqual(TOOL_GROUPS);
+  });
+
+  test("is JSON-serializable", () => {
+    expect(() => JSON.stringify(TOOL_POLICY_CONFORMANCE)).not.toThrow();
+  });
+});