Implemented default pipeline

src/file-processor/app/database/connection.py

@@ -7,6 +7,7 @@ The application will terminate if MongoDB is not accessible at startup.
 
 import sys
 from typing import Optional
+
 from pymongo import MongoClient
 from pymongo.database import Database
 from pymongo.errors import ConnectionFailure, ServerSelectionTimeoutError
@@ -107,6 +108,15 @@ def get_mongodb_client() -> Optional[MongoClient]:
   return _client
 
 
+def get_extra_args(session):
+  # Build kwargs only if session is provided
+  kwargs = {}
+  if session is not None:
+    kwargs["session"] = session
+  
+  return kwargs
+
+
 def test_database_connection() -> bool:
   """
   Test if database connection is working.
@@ -122,4 +132,4 @@ def test_database_connection() -> bool:
     db.command('ping')
     return True
   except Exception:
-    return False
+    return False