Create a web call and generate LiveKit access token for browser-based calling
sk_...)s3cr3t_...)"agent_1234567890"customer_id: Customer identifiersession_type: Type of session (e.g., “support”, “sales”)priority: Priority levelfalsecall_...room_name: LiveKit room name for the callaccess_token: LiveKit JWT token for connectingcall_status: Current status of the callagent_id: The agent ID assigned to this callserver_url: LiveKit server WebSocket URLtoken: LiveKit access tokenroom_name: Room name to connect to