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* Update A1 mediator client to version 0.4.0
* Add E2 response message with timestamp and status code
* Fetch xAPP instance status information from xAPP Manager and display in dashboard
* Allow the user to initiate an E2 (X2) connection between RIC and gNB/eNB
--------------------------
* Update A1 mediator client to version 0.4.0
* Add E2 response message with timestamp and status code
* Fetch xAPP instance status information from xAPP Manager and display in dashboard
* Allow the user to initiate an E2 (X2) connection between RIC and gNB/eNB