ChatSession DTO according to api-documentation.yaml
Schema definition: ChatSessionDto: properties: sessionID: string (uuid) applicationID: string (uuid) status: string (enum: [ACTIVE, COMPLETED, EXPIRED]) startTimestamp: string (date-time) endTimestamp: string (date-time) messageCount: integer
{
"sessionId": "string",
"applicationId": "string",
"status": "ACTIVE",
"startTimestamp": "string",
"endTimestamp": "string",
"messageCount": 0
}