fix(celery): adjust try-catch logic to improve error handling

Capturing the instantiation of the database and dataset manager objects inside the try-catch will cause errors if something else fails.

If an exception occurs and the dataset_manager is not initialised, the code inside the catch block will fail.

server/queue/tasks.py

@@ -2,17 +2,15 @@ import pandas as pd
 
 from server.queue.celery_app import celery
 from server.analysis.enrichment import DatasetEnrichment
-
-@celery.task(bind=True, max_retries=3)
-def process_dataset(self, dataset_id: int, posts: list, topics: dict):
-
-    try:
 from server.db.database import PostgresConnector
 from server.core.datasets import DatasetManager
 
+@celery.task(bind=True, max_retries=3)
+def process_dataset(self, dataset_id: int, posts: list, topics: dict):
     db = PostgresConnector()
     dataset_manager = DatasetManager(db)
 
+    try:
         df = pd.DataFrame(posts)
 
         processor = DatasetEnrichment(df, topics)