SIENTIAPDE-1325

SIENTIAPDE-1325 Add OPC server name configuration and update repository handling

- Introduced a new environment variable `OPC_SERVER_NAME` in values.yaml with a default value.
- Updated the OPC class to include `server_name` when initializing OpcRepository.
- Enhanced the configuration builder to retrieve `OPC_SERVER_NAME` from the environment.
- Adjusted OpcRepository to store and utilize the `server_name` for metric emissions.

values.yaml

@@ -182,6 +182,8 @@ env:
 
   - name: OPC_ID
     value: "1"
+  - name: OPC_SERVER_NAME
+    value: "default_server"
   - name: OPC_URL
     value: "opc.tcp://sientia-opc-simulator-opc.sientia.svc.cluster.local:4840"