Shorten instance/<instanceID>/events/:name endpoint response

[piotrek6641]

Make events data more readable with removal of redundant data in output
http://0.0.0.0:8000/api/v1/instance/{instanceId}/events/{eventName}

before:

{ "eventName": "msg", "message": { "a": 1 } }
{ "eventName": "msg", "message": { "a": 2 } }
{ "eventName": "msg", "message": { "a": 3 } }

now returns:

{ "a": 1 }
{ "a": 2 }
{ "a": 3 }

without message used to return:

{ "eventName": "msg"  }
{ "eventName": "msg"  }
{ "eventName": "msg"  }

now returns

 {}
 {}
 {}

Screenshots

events with no message:

events with object as a message:

events with string as a message:

Clickup Task:
https://app.clickup.com/t/24308805/VDM-1283
Issue:
#328

[a-tylenda]

I verified and endpoint /api/v1/instance/{instanceId}/events/{eventName} works as described in PR description, but...
there is a discrepancy between API and CLI. This is because under CLI command si inst event on <id> there is getEvent() method this.router.get not this.router.upstream edited by @piotrek6641