Update environment configuration and refactor OPC activities for async handling

- Expanded the .env file with configurations for MongoDB, Postgres, MlFlow, and Temporal.
- Refactored OPC class methods to be asynchronous, including init_opc, write_data, manage_output_tags, and shutdown.
- Updated the worker to initialize OPC asynchronously and adjusted shutdown handling for activities.

laborious/activities/activities.py

@@ -44,6 +44,6 @@ class Activities(Postgres, MLFlow, Gates, OPC):
                      logger=logger,
                      notification_handler=notification_handler)
 
-    def shutdown(self):
+    async def shutdown(self):
         Postgres.close(self)
-        OPC.shutdown(self)
+        await OPC.shutdown(self)