fix(routing): harden originating reply routing

src/agents/pi-tool-definition-adapter.test.ts

@@ -1,6 +1,5 @@
-import { describe, expect, it } from "vitest";
-
 import type { AgentTool } from "@mariozechner/pi-agent-core";
+import { describe, expect, it } from "vitest";
 
 import { toToolDefinitions } from "./pi-tool-definition-adapter.js";