SIENTIAPDE-1205

SIENTIAPDE-1205: Refactor timestamp handling in MongoDB activities

- Updated the import statement in mongo_db.py to include timezone support.
- Modified timestamp formatting to ensure UTC timezone is applied before string conversion, enhancing consistency in datetime handling.

orchestrator/activities/mongo_db.py

@@ -10,7 +10,7 @@ with workflow.unsafe.imports_passed_through():
     from sientia_do.notifications.models import NotificationLevel
     from sientia_do.temporal.activities.base import BaseActivity
     from sientia_do.temporal.constants import DATETIME_FORMAT_MS_WITH_TZ, now
-    from datetime import datetime
+    from datetime import datetime, timezone
 
 
 def clear_mongo_id(docs: list) -> list:
@@ -459,7 +459,7 @@ class MongoDB(BaseActivity):
             )
 
             for item in data:
-                item['timestamp'] = item['timestamp'].strftime(
+                item['timestamp'] = item['timestamp'].replace(tzinfo=timezone.utc).strftime(
                     DATETIME_FORMAT_MS_WITH_TZ)
 
             self.info(