Fix import formatting and sorting

Ruff formatting fixes for import organization.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

backend/app/routers/dashboard.py

@@ -34,7 +34,7 @@ from app.models.ban import (
     TimeRange,
 )
 from app.models.server import ServerStatus, ServerStatusResponse
-from app.services import ban_service, geo_service
+from app.services import ban_service
 from app.utils.constants import DEFAULT_PAGE_SIZE
 
 router: APIRouter = APIRouter(prefix="/api/dashboard", tags=["Dashboard"])