ChatMessageDto

ChatMessage DTO according to api-documentation.yaml

Schema definition:
ChatMessageDto:
properties:
messageId: string (uuid)
sessionId: string (uuid)
sender: string (enum: [AI, CANDIDATE])
content: string
sentAt: string (date-time)

{
    "messageId": "string",
    "sessionId": "string",
    "sender": "AI",
    "content": "string",
    "sentAt": "string"
}