Implements order-inventory integration that automatically manages stock
when order status changes:
- processing: reserves inventory for order items
- shipped: fulfills (deducts) from stock
- cancelled: releases reserved inventory
Creates OrderInventoryService to orchestrate operations between
OrderService and InventoryService. Placeholder products (unmatched
Letzshop items) are skipped. Inventory errors are logged but don't
block order status updates.
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Samir Boulahtit
871f52da80