test(01-02): exercise DNS transition cases past fetch port guard

- replace blocked port 9 with non-blocked test port 8089
- preserve pre-connect ENOTFOUND assertions for all transition forms

src/lib/__tests__/safe-fetch-dispatcher.test.ts

@@ -207,7 +207,7 @@ describe("pinnedPublicDispatcher", () => {
       const dispatcher = getPinnedPublicDispatcher();
       let caught: unknown;
       try {
-        await undiciFetch("http://transition-answer.example.test:9/probe", {
+        await undiciFetch("http://transition-answer.example.test:8089/probe", {
           dispatcher,
           signal: AbortSignal.timeout(750),
         });