style: ruff's own fixes, mechanically applied

`ruff check .` had gone unrun long enough to report 568 errors, which is the
same as having no linter: the next real finding would have been invisible in the
noise. This is the 521 it fixes by itself, in 173 files, and nothing else — the
98 it cannot fix are the next commit.

What actually changed: import sorting (225), imports nobody used (87, none of
them a re-export — no `__init__.py` is touched, which was the one way this could
have broken an import elsewhere), `datetime.timezone.utc` to `datetime.UTC` (69)
and `asyncio.TimeoutError` to `TimeoutError` (18), both plain aliases on the 3.12
this project requires, `Optional[X]` to `X | None` (24), and f-strings with
nothing to interpolate (19).

Checked rather than assumed: every module in the three packages still imports,
and the suite is 2893 passed — the same count, test for test, as the merge
before it.

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

1 files changed, 3 insertions, 3 deletions

diff --git a/packages/meshbay-node/src/meshbay_node/indexer/enrich.py b/packages/meshbay-node/src/meshbay_node/indexer/enrich.py
index b44a246..9881298 100644
--- a/packages/meshbay-node/src/meshbay_node/indexer/enrich.py
+++ b/packages/meshbay-node/src/meshbay_node/indexer/enrich.py
@@ -13,12 +13,12 @@ the rest asynchronously and hands the result back via a callback.
 
 import asyncio
 import logging
+from collections.abc import Awaitable, Callable
 from pathlib import Path
-from typing import Awaitable, Callable
 
 import blake3
-
 from meshbay_common.protocol import IndexEntry
+
 from meshbay_node.indexer import title_parse
 from meshbay_node.indexer.indexer import MEDIA_EXTENSIONS
 from meshbay_node.media_cache import MediaCache
@@ -173,7 +173,7 @@ async def _make_thumbnail(file_path: Path, duration: float | None) -> bytes | No
     )
     try:
         stdout, _ = await asyncio.wait_for(proc.communicate(), THUMB_TIMEOUT_SECS)
-    except asyncio.TimeoutError:
+    except TimeoutError:
         proc.kill()
         await proc.wait()
         return None