The expression of the orderId pattern of an AddOrder instruction requires a function to provide a unique orderId

Current Situation

The orderid pattern of an AddOrder instuction is unique per millisecond and position of the instruction.
If an AddOrder instruction is used in a Forklist then it has inside the Workflow JSON the same position for all later generated branches.
If this AddOrder instruction is also used as the first instruction of the Forklist, then all childOrders will reach the AddOrder instruction in the same millisecond and the generated orderIds are no longer unique.

Desired Behavior

A function in the expression of the orderId pattern should ensure uniqueness.
Due to the format of the orderIds, this function should return two digits that are unique within one millisecond.