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, 2 insertions, 3 deletions

diff --git a/packages/meshbay-hub/src/meshbay_hub/api/admin.py b/packages/meshbay-hub/src/meshbay_hub/api/admin.py
index 7ca1e68..d8e13e9 100644
--- a/packages/meshbay-hub/src/meshbay_hub/api/admin.py
+++ b/packages/meshbay-hub/src/meshbay_hub/api/admin.py
@@ -6,19 +6,18 @@ Separate from moderation.py (which handles public reporting and content blocklis
 """
 
 import logging
-from datetime import datetime, timezone
 
 from fastapi import APIRouter, Depends, HTTPException, Query
 from pydantic import BaseModel
 from sqlalchemy import func, select
 from sqlalchemy.ext.asyncio import AsyncSession
 
-from meshbay_hub.auth import decrypt_email
+from meshbay_hub import hub_settings
 from meshbay_hub.api.deps import require_admin, require_moderator, user_is_admin
 from meshbay_hub.api.revocation import get_connected_node_count, is_node_connected
+from meshbay_hub.auth import decrypt_email
 from meshbay_hub.db.engine import get_db
 from meshbay_hub.db.models import Group, GroupMember, IPLog, Node, User
-from meshbay_hub import hub_settings
 
 log = logging.getLogger(__name__)