Be alpaca backtesting

[brettelliot]

Description by Korbit AI

What change is being made?

Remove the include_cash_positions parameter from strategy setup to use a default configuration for cash handling except in drift_rebalancer, where it is explicitly set to True.

Why are these changes being made?

This change standardizes strategy configuration by removing the redundant include_cash_positions parameter, allowing the system's default handling of cash positions unless explicitly needed, like in the drift_rebalancer strategy. The updated approach minimizes code duplication and potential configuration errors across different strategy files.

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I've completed my review and didn't find any issues.

Files scanned

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File Path	Reviewed
lumibot/example_strategies/classic_60_40.py	✅
lumibot/example_strategies/crypto_50_50.py	✅
lumibot/example_strategies/drift_rebalancer.py	✅
lumibot/tools/helpers.py	✅

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