style: apply ruff formatting sweep

Co-authored-by: Copilot App <[email protected]>

docs/reviews/2026-08-23-code-review.md

@@ -384,6 +384,7 @@ The critical gap is transaction atomicity (HIGH-04) — the audit verdict is **"
 ```python
 # src/transcription/services/base.py
 
+
 @asynccontextmanager
 async def unit_of_work(
     services: ServiceBundle,
@@ -396,10 +397,12 @@ async def unit_of_work(
     HIGH-01 structurally hard to reintroduce.
     """
 
+
 async def run_blocking[T](fn: Callable[[], T]) -> T:
     """Run a CPU- or disk-bound callable off the event loop."""
     return await asyncio.to_thread(fn)
 
+
 async def insert_with_sequence_retry(
     session: AsyncSession,
     *,