Send a message to a conversation

curl --request POST \
  --url https://dev.flextell.ai/api/v1/conversations/{id}/messages \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "message": "<string>",
  "quoted_message_id": 123
}
'

{
  "success": "<string>",
  "data": {
    "status": "<string>",
    "message_id": "<string>",
    "conversation_id": "<string>"
  }
}