en-manager must provide enrichment rules

[akhtyamovrr]

Problem

There is no way to configure Eventnative enrichment rules using en-manager

Solution

en-manager backend must add enrichment rules to destinations. Config example:

{
  "destination_id": {
  ...
  "_enrichment": [
      {
        "name": "ip_lookup",
        "from": "/source_ip",
        "to": "/eventn_ctx/location"
      } ,
      ...
  ],
}

Such config should be processed by backend and added to destinations endpoint response