SIENTIAPDE-1193

Update requirements and refactor timestamp handling in DataManager

- Updated sientia-dataops-library version to 1.4.3 in requirements.txt.
- Refactored timestamp insertion in DataManager to use the now() function for improved consistency.

ingestor/managers/data_manager.py

@@ -1,11 +1,11 @@
 import json
 from time import sleep
-from datetime import datetime, timezone
 from pymongo import MongoClient
 from kafka import KafkaProducer
 from kafka.errors import NoBrokersAvailable
 from sientia_do.notifications.handlers import CoreNotificationHandler as NotificationHandler
 from sientia_do.notifications.models import NotificationLevel
+from sientia_do.temporal.constants import now
 from sientia_do.temporal.activities.base import BaseActivity
 from sientia_do.observability.logger import Logger
 import traceback
@@ -184,7 +184,7 @@ class DataManager(BaseActivity):
             collection.insert_one(
                 {
                     **data,
-                    "inserted_at": datetime.now(timezone.utc),
+                    "inserted_at": now(),
                 }
             )
             self.logger.debug(