Pasture: Funkwhale joins, closing wave 1

Funkwhale 2.0.11: the API, a Celery worker with its beat and the front's nginx sharing one volume, on the shared Postgres
and Redis, trusting the pasture's CA through REQUESTS_CA_BUNDLE; fwuser and its OAuth token made by its own tools.
scenarios/funkwhale.sh passes its 16 checks: alice follows a channel, a track uploaded to it arrives as Audio with its
file and duration, its deletion reaches PrivaPub, the unfollow, statistics.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LsXgEaXee4GCU1hwYgPJXw

docs/INTEROP.md

@@ -831,11 +831,22 @@ FEP-8a8e (draft) is the common reference.
   - `Create{Audio}` whose `url` is an array: a page link plus the stream, with `bitrate` and `size`.
   - Also `duration`, `position`, `disc`, `album`, `license` and `image`; `summary` is a hashtag line (W2).
   - `Listen{Track}`.
+  - Its Accept names our Follow under an id of its own on our origin (`…/alice#follows/<uuid>`), and its own id is
+    that plus `/accept`: PrivaPub refused it as off its actor's origin (400) until 2026-10-05, so no follow of a
+    channel ever completed.
+  - A channel deletes uploads in one `Delete` with no id, the uploads' ids in a list as the object's `id`: PrivaPub read
+    no id there until 2026-10-05.
+  - Its NodeInfo discovery names the document under its swagger schema's URL as `rel`; PrivaPub now takes a link whose
+    path names NodeInfo. A channel's followers and following collections answer 500.
+  - **Pasture evidence (2026-10-05, Funkwhale 2.0.11, `tools/pasture/scenarios/funkwhale.sh`):** 16 checks pass: alice
+    follows a channel; a track uploaded to it arrives as Audio with its file and duration; its deletion; the unfollow;
+    statistics.
 - **Castopod:** an episode arrives as a link-only Note; the player comes from OpenGraph/oEmbed. Fetching the episode
   with the podcast type gives a `PodcastEpisode` with transcript and chapters.
 - **Owncast:** a `Service` actor; "go live" is a Note with a thumbnail.
 - **Gaps:**
-  - **P1:** pick the audio Link out of `url`, sniff its type, apply W2. Surfaces as `MediaAttachment{type: audio}`
+  - ~~**P1:** pick the audio Link out of `url`, sniff its type, apply W2~~ (Funkwhale's Audio arrives with its file and
+    duration, 2026-10-05). Surfaces as `MediaAttachment{type: audio}`
     with `meta.original.duration` and the cover as `preview_url`.
   - **P2:** duration, cover, album, position and licence (own `privapub.audio`); the Castopod transcript and chapters.
   - **P3:** `Listen` history; Owncast live state.