feat(backtest-optimization): reduce overhead of calls in Orders

[yakir4123]

IMPORTANT: Changes in Live-plugin is required

orders are used a lot, and each filed is an orm field which give an overhead for every setter / getter of the attributes.

refactor it to simple dataclass remove this overhead.

Here is an example of strategy that is always in position and has a lot of entry and exit orders
Current state

With these modification

The numbers are getting bigger when there are more orders for longer times.

[stale]

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