FN-8844: correct delegation role error assertion

Align the delegation role test with the pluralized runtime error message.

- Update the reviewer delegation rejection expectation to use the roles label.

Files changed:
 packages/engine/src/__tests__/agent-tools-delegation.test.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Fusion-Task-Id: FN-8844

Fusion-Task-Lineage: d9a34bda-71de-4b47-b93d-a27dfeb018d1

Co-authored-by: Fusion (runfusion.ai) <noreply@runfusion.ai>

packages/engine/src/__tests__/agent-tools-delegation.test.ts

@@ -1030,7 +1030,7 @@ describe("createDelegateTaskTool", () => {
     }, undefined as any, undefined as any, undefined as any);
 
     const text = (result.content[0] as { text: string }).text;
-    expect(text).toContain("ERROR: Agent agent-002 has role \"reviewer\"");
+    expect(text).toContain("ERROR: Agent agent-002 has roles \"reviewer\"");
     expect(text).toContain("Pass override=true to bypass");
     expect(taskStore.createTask).not.toHaveBeenCalled();
   });