This endpoint (/hellfire_portal.html) and audio slot (/assets/odyssey_deep_dive_03_hellfire_federal.m4a) are pre-wired into the 10-minute sync worker.
As soon as NotebookLM finishes compiling in your browser Studio panel, save the exported HTML or audio file to ~/Downloads (with Hellfire in the filename) or into your Google Drive deployment folder, and the 10-minute background worker will transcode, hash, commit to GitHub, and publish it automatically.