Wire IBIT zscore exit runtime settings

[Pigbibi]

Summary

• Load IBIT_ZSCORE_EXIT_* runtime env settings and pass them only to ibit_smart_dca.
• Expose the new settings in deployment env sync / strategy switch plans.
• Pin us-equity-strategies to the commit that contains IBIT z-score exit and BOXX-funded DCA support.

Test Plan

• Targeted runtime config and strategy runtime tests for this platform
• Env-sync workflow test for this platform
• Ruff check on changed runtime/test files

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Avoid pulling in the global ETF snapshot migration

This pin advances through the upstream commit that changes global_etf_rotation from direct market_history/portfolio_snapshot inputs to snapshot-backed feature_snapshot artifacts. In this repo, tests/test_strategy_registry.py still asserts the Firstrade adapter for global_etf_rotation uses broker runtime inputs, and the env-sync workflow will now require FIRSTRADE_FEATURE_SNAPSHOT_PATH for that profile; existing global ETF deployments without snapshot artifacts will start failing env sync instead of running from broker market data. Please either pin to a strategy commit that contains only the IBIT changes or update the platform/test/configuration for the new snapshot-backed contract.

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