[codex] filter IBKR strategy portfolio equity

[Pigbibi]

Summary

• Project IBKR portfolio snapshots to configured strategy symbols before strategy evaluation.
• Filter dashboard and execution account values to strategy positions plus buying power.
• Add a local total-equity override so the platform is protected even before the shared kit pin advances.

Root Cause

IBKR account snapshots use broker account net liquidation, so non-strategy positions could inflate strategy logs, notifications, and value-target inputs.

Validation

• python3 -m py_compile application/rebalance_service.py strategy_runtime.py
• Lightweight direct checks for _strategy_portfolio_view and projected PortfolioSnapshot equity.

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Base projected equity on market value, not cost basis

For accounts that already hold any strategy symbol whose current price differs from its average cost, this projection changes account_values["equity"] from broker net liquidation to buying power plus cost basis (quantity * avg_cost). execute_rebalance then sizes targets from this equity while valuing current holdings with live quotes, so appreciated positions can be under-targeted and depreciated positions over-targeted even when the account contains only strategy positions. The projection needs to carry/use actual market value from the portfolio snapshot or quote the filtered symbols rather than using average cost.

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