0048646: The contents of the TicketList property of the application state should be smaller

Description

The size of the application state has a big impact on the performance, as bigger states results in its persistence taking longer, and also on more frequent garbage collection runs.

We are currently storing in the TicketList property of the state the full object that represents all the parked orders. This means that any time that any property of the state is updated, those orders will be loaded into memory and then persisted again, unmodified.

We should remove as much information from that property as possible. We might need to keep some info on it (for instance type, status, Customer, Total, as they are displayed on the Parked Orders window), but the rest should be stored elsewhere and loaded only when needed.

Steps To Reproduce

In the terminal where this problem was reproducible, the average duration of the addProduct task went down from ~400ms to ~230ms after cleaning up the state. This included not only the TicketList property but others too.

Issue History
Date Modified	Username	Field	Change
2022-02-21 14:23	AugustoMauch	New Issue
2022-02-21 14:23	AugustoMauch	Assigned To	=> Retail
2022-02-21 14:23	AugustoMauch	Triggers an Emergency Pack	=> No
2022-02-21 14:23	AugustoMauch	Issue generated from	0048645

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