Upserting an Asset returns 500 on duplicate owners

[StewartJingga]

Describe the bug
When upserting an asset with duplicate owners, Compass returns 5xx with no clear error message.

Sample request payload

{
  "urn": "sample-urn",
  "owners": [
    {
      "uuid": "sample-uuid",
      "email": "john@doe.com"
    },
    {
      "uuid": "sample-uuid",
      "email": "john@doe.com"
    }
  ]
}

To Reproduce
Steps to reproduce the behavior:

1. Upsert an Asset with duplicate owners as shown in the example above
2. Get 5xx error

Expected behavior
When handling duplicate owners, Compass should handle it by either:

1. Distinct the owner list and return no error
2. Return 4xx error to indicate that the payload is invalid and let client fix it