docs(open-notebook): runbook, episode-destination interim, and the log entry

Page registered in the vault index (the docs-completeness seam fails an
unregistered page) and logged in the bundle change log.

What the page owes the reader: the provider contract (frank-zealot for scripts
with a /v1 base URL, frank-tts for voices with 1-4 speakers mapped to the
narrator1/2/3 voice packs typed as free text), why Test Connection and Discover
Models fail cosmetically against frank-tts rather than being a fault, the
encryption key as the precondition for saving any credential, and the honest
blocker — frank-tts is not deployed and nothing listens on 7772, so a generation
run writes its script and fails on the first voice.

Episode destination is stated as interim and cites Gitea issue #7 (human-only,
agents must not work it): the app keeps its named volume, one bind mount puts
finished MP3s under /home/dank/media/podcasts, and deleting that one line is the
whole rollback. Rollback section also covers the full undo, including that the
podman network only disappears once the units are gone.

serverAppConfigs-docs/index.md

@@ -79,6 +79,7 @@ macOS mini) as quadlets inside its podman machine — not on Dankserver.
 - [[Postgres]] — Gitea database backend
 - [[Seerr]] — unified *arr request manager (guard-chained; fronts FrankBook-Pro's stack)
 - [[Marreta]] — content-cleaning proxy (guard-chained; shares SearXNG's Gluetun egress)
+- [[Open Notebook]] — podcast generator (scripts by frank-zealot, voices by frank-tts); repo-owned config, not deployed
 
 ## Infrastructure