Add expiring inventory reservations workflow

[marinasundstrom]

Summary

• add domain model and persistence for warehouse item reservations with timed expiration and consumption tracking
• expose API commands and DTOs for creating, confirming, and releasing reservations and include them in warehouse item responses
• schedule a Quartz job to automatically expire pending reservations and extend unit coverage for reservation behavior

Testing

• dotnet test src/Inventory/Inventory.Tests/Inventory.Tests.csproj --no-build --logger "console;verbosity=minimal"

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https://chatgpt.com/codex/tasks/task_e_690a49068138832f9959901dd70a13ac