Audiobooks: talk to OpenAudible directly with its own username and password (OPENAUDIBLE_URL)

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

.gitea/workflows/build.yml

@@ -32,6 +32,7 @@ jobs:
       - run: node tools/signal-test.js  # Signal: linking, messages, sending, live updates
       - run: node tools/podcast-test.js # Podgrab podcasts: only allowed calls pass, password stays on the server
       - run: node tools/abapi-test.js   # audiobooks: signed in as the person, audio ranges, progress, blocked calls
+      - run: node tools/abdirect-test.js # audiobooks straight from OpenAudible: its login, byte ranges, positions kept by the hub
 
       - uses: docker/setup-buildx-action@v3