fix: persist equity STOP submissions in the shared execution store

[felipecsl]

Summary

equity submit could not submit a STOP order. The shared execution store checked single submission records against its own copy of the equity intent schema, and that copy accepted orderType: "LMT" only. For a STOP preview, the submission reservation threw a ZodError. That happens before the broker write, so no order was placed and the command failed.

• canonicalEquityIntentSchema (LMT or STP) now lives in src/equities/equityOrder.ts. The equity service and the shared execution store both use this one schema. The LMT-only copy is removed.
• equityOrder.ts has no runtime imports, so the move adds no import cycle.

Tests

• New test: "the shared execution store persists an equity STOP submission". It failed before this fix with a ZodError from the store, and it passes now.
• yarn check passes.

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
🔒 Security Review	✅ Completed 2026-09-28T01:37:21.577765Z	93d43e0	PR opened

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