Task Request
data class TaskRequest(val taskType: String = "", val targetUid: String = "", val assigneeUid: String = "", val priority: Int = 0, val status: Int = 0, val note: String = "") : TakPacketV2Data.Payload(source)
Task / engage request (CoT type t-s).
Maps to the TaskRequest protobuf message at payload_variant tag 40. The requester UID is implicit from TAKPacketV2.uid.