Arbitrage cross-venue sanity test

[Miracle656]

Background

If venue A and B differ by >5%, we should alert. Sanity tests prevent silent breakage.

What to build

A test injecting divergent venue prices and asserting an alert/warning surfaces.

Key files

• tests/arbitrage.test.ts (new)

Acceptance criteria

• Divergence triggers alert path

Drips Wave · Complexity: Intermediate · 150 points

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[alamuoyeemmanuel7-create]

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[deedee-code]

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