style: the 98 ruff could not fix, so the linter is a signal again

The pass before this applied ruff's own fixes. These are the ones needing a
decision, and the point of doing them is that `ruff check .` now passes: a
linter reporting 98 known-acceptable findings reports nothing, because the next
real one arrives invisible.

**Lines over 100 (70).** Mostly wrapped where they stood. Two exceptions: the
aligned trailing comments in `protocol.py`'s message table were shortened rather
than wrapped, because wrapping one row of a table breaks the table; and in
`models.py` the column comments moved above their columns for the same reason.

**Imports below the first statement (14).** `csam.py` kept its FastAPI imports
under a section header halfway down the file; two node tests had a constant and
a `pytestmark` wedged between two import blocks. Moved, not suppressed.

**Bindings nothing reads (4).** Three in tests, where the call stays and only the
name goes — `_user(client, "listener")` is there to create the user, not to
return one. The fourth was in `revocation.py` and was not a lint finding at all:
`_connect_and_listen` opened an httpx stream to the WebSocket URL, did `pass`,
and then opened the real connection through the `websockets` library. One
pointless request per connect, left over from before that library was used
directly. Removed, and `httpx` with it.

**`l` as a name (4)**, **semicolons (6)** in the POC spikes, and the rest.

2893 passed, the same count as the two commits before it.

`meshbay_node/revocation.py` is worth a decision separately: 154 lines that
nothing imports, superseded by `hub_client.maintain_ws`'s `on_revocation`. This
commit only stopped it failing the linter.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

1 files changed, 15 insertions, 7 deletions

diff --git a/packages/meshbay-node/src/meshbay_node/transport/webrtc_server.py b/packages/meshbay-node/src/meshbay_node/transport/webrtc_server.py
index 2bd1419..e92ec13 100644
--- a/packages/meshbay-node/src/meshbay_node/transport/webrtc_server.py
+++ b/packages/meshbay-node/src/meshbay_node/transport/webrtc_server.py
@@ -3930,7 +3930,8 @@ class WebRTCPeerSession:
         if not entry:
             thumb = await self._try_serve_thumbnail(file_id, chunk_index, ctx.get("gek"))
             if thumb is not None:
-                log.debug("file_req file_id=%s chunk=%s: served as thumbnail", file_id[:16], chunk_index)
+                log.debug("file_req file_id=%s chunk=%s: served as thumbnail",
+                          file_id[:16], chunk_index)
                 self._send(thumb)
                 return
             log.warning("File not found: %s", file_id[:16])
@@ -3998,7 +3999,8 @@ class WebRTCPeerSession:
             self._leaseless.finish(str(file_id))
 
     @staticmethod
-    async def _fetch_and_cache_poster(media_cache, tmdb_client, poster_path: str | None) -> str | None:
+    async def _fetch_and_cache_poster(media_cache, tmdb_client,
+                                      poster_path: str | None) -> str | None:
         """
         Downloads a TMDB poster/backdrop once, caches it under its own
         blake3 like a video thumbnail (docs/MESHBAY_DESIGN.md §9.7), and
@@ -4026,7 +4028,8 @@ class WebRTCPeerSession:
         return thumb_hash
 
     @staticmethod
-    async def _fetch_and_cache_cover(media_cache, musicbrainz_client, mbid: str | None) -> str | None:
+    async def _fetch_and_cache_cover(media_cache, musicbrainz_client,
+                                     mbid: str | None) -> str | None:
         """
         Music app equivalent of `_fetch_and_cache_poster` — a release's
         Cover Art Archive image, fetched once per mbid and cached under its
@@ -4510,7 +4513,9 @@ class WebRTCPeerSession:
             # itself.
             if not fetched.get("overview"):
                 fallback = await tmdb_client.tv_season(tmdb_id, season, language="en-US") or {}
-                fetched = {**fallback, **{k: v for k, v in fetched.items() if v not in (None, "", [])}}
+                fetched = {**fallback,
+                           **{k: v for k, v in fetched.items()
+                              if v not in (None, "", [])}}
             await media_cache.set_season_meta(tmdb_id, season, fetched)
             details = fetched
 
@@ -4839,8 +4844,10 @@ class WebRTCPeerSession:
         # back to English per field rather than discarding an otherwise-good
         # localized response over one empty one — mirrored here the same
         # way, at field granularity, not by abandoning the whole response.
-        if not details.get("overview") or not details.get("poster_path") or not details.get("genres"):
-            fallback = (await tmdb_client.tv_details(tmdb_id, language="en-US") if media_type == "tv"
+        if (not details.get("overview") or not details.get("poster_path")
+                or not details.get("genres")):
+            fallback = (await tmdb_client.tv_details(tmdb_id, language="en-US")
+                        if media_type == "tv"
                        else await tmdb_client.movie_details(tmdb_id, language="en-US")) or {}
             details = {**fallback, **{k: v for k, v in details.items() if v not in (None, "", [])}}
         credits = (await tmdb_client.tv_credits(tmdb_id) if media_type == "tv"
@@ -5915,7 +5922,8 @@ class WebRTCPeerSession:
         transcript = admin_transcript(
             op=pending["op"],
             node_pk_b64=self._node_pk_b64(),
-            group_id=pending["group_id"] if pending.get("group_id") is not None else (self._group_id or ""),
+            group_id=(pending["group_id"] if pending.get("group_id") is not None
+                      else (self._group_id or "")),
             subject=pending["subject"],
             nonce=pending["nonce"],
             ts=pending["ts"],