500 when additional field added to chat/completions-detection

[evaline-ju]

Describe the bug

500 errors are appearing when additional fields are provided to the completions-detection requests

Sample Code

curl -X 'POST' \
  'http://localhost:8033/api/v2/chat/completions-detection' \
  -H 'accept: application/json' \
  -H 'Content-Type: application/json' \
  -d '{
  "messages": [
    {
      "content": "this is a nice sentence",
      "role": "user",
      "name": "string",
      "additional": "test" # extra field
    }
  ],
  "model": "chat-completions-model",
  "n": 1,
  "temperature": 1,
  "top_p": 1,
  "user": "user-1234",
  "detectors": {}
}'

Expected behavior

422 validation error

Observed behavior

{"code":500,"details":"unexpected error occurred while processing request"}