[codex] simplify compact notifications and update dashboard pin

[Pigbibi]

Summary

• Simplify Telegram compact notifications to account/positions/trade outcome only.
• Fix margin-enabled dashboard wording so buying power is not described as cash-only assets.
• Bump UsEquityStrategies pin to the merged dashboard fix.

Test Plan

• See repository-specific pytest commands in the PR checks and local validation.

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Avoid labeling buying-power totals as net liquidation

When margin mode is enabled, FirstradeBrokerAdapters._resolve_total_equity returns buying_power + position_market_value before falling back to the broker's account total, and run_strategy_cycle passes managed symbols so that branch is used for strategy portfolios. For margin accounts where buying power includes loan capacity, the value rendered here is therefore not net liquidation, so the new label can make users read a levered purchasing-power figure as account equity. Please either feed an actual net-liquidation/account-value field into this label or keep the wording aligned with the underlying buying-power-plus-positions value.

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