fix: isort grouping (qp_capsule is third-party in CI)

Author: bradleygauthier

reference/python/tests/test_chain_concurrency.py

@@ -21,7 +21,6 @@
 from unittest.mock import AsyncMock
 
 import pytest
-
 from qp_capsule.capsule import Capsule, TriggerSection
 from qp_capsule.chain import CapsuleChain, _MAX_CHAIN_RETRIES, _is_integrity_error
 from qp_capsule.exceptions import CapsuleError, ChainConflictError, ChainError, StorageError