Cash Balance Becomes Negative with Multiple `BUY` Activity Orders

[dp-singh]

When only BUY orders are input, the cumulative cash balance becomes negative on the AccountPage. (Refer to the screenshot)

Steps to Reproduce:

• Enter multiple BUY orders for share in specific account.
• Observe that the cash balance becomes negative on the AccountPage.

Technical Observation: In the calculate_historical_value function, the handling of cumulative_cash assumes that there are sufficient "DEPOSIT", "TRANSFER_IN", or "CONVERSION_IN" activities to cover the costs associated with BUY orders.