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The PR

Title: Add shipping estimate to checkout Summary: Customers want to know shipping cost before placing an order. This PR integrates with a shipping API to calculate and display shipping estimates. Changes:
  • New API call to shipping service: GET /estimate?zip={zip}&weight={weight}
  • Shipping cost displayed in checkout
  • Estimated delivery date shown to customer

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Factor Analysis

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Verdict

BLOCK_REVIEW
The PR has critical assumptions about external API behavior that must be validated.
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