style: Format code with ruff

- Format 5 files affected by PDF scraper changes
- Ensures CI/CD code quality checks pass

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

uv.lock

@@ -1846,7 +1846,7 @@ wheels = [
 
 [[package]]
 name = "skill-seekers"
-version = "2.8.0.dev0"
+version = "2.7.4"
 source = { editable = "." }
 dependencies = [
     { name = "anthropic" },