SIENTIAPDE-1273

Refactor imports in opc.py to improve code clarity

- Moved the import of Hashable from collections.abc to the appropriate section, enhancing readability and organization of imports.

laborious/activities/opc.py

@@ -1,9 +1,8 @@
-from collections.abc import Hashable
-
 from temporalio import activity, workflow
 
 with workflow.unsafe.imports_passed_through():
     import traceback
+    from collections.abc import Hashable
     from typing import Any
 
     from pandas import DataFrame