feat: add read-only inventory API

backend/app/inventory/dependencies.py

@@ -0,0 +1,8 @@
+"""Dependency construction for the Inventory domain."""
+
+from app.inventory.repository import InventoryRepository
+from app.inventory.service import InventoryService
+
+
+def get_inventory_service() -> InventoryService:
+    return InventoryService(InventoryRepository())