feat(checkout): execute check-out and trigger cleaning

[temps-code]

Objective

Implement check-out and automatically trigger cleaning workflow.

MVP Metadata

• MVP Phase: Operations
• Module: checkin-checkout
• Priority: Medium
• Type: Feature
• FR: FR-08, FR-09, FR-16
• Branch Target: features

Acceptance Criteria

• Check-out finalizes the active stay.
• Reservation/reservation item state is updated consistently when applicable.
• Room state changes to cleaning.
• A housekeeping cleaning task is created for the room.
• Duplicate check-out and invalid property/status cases are rejected.
• Operation remains scoped by property and is implemented in service logic, not only JSX.

Evidence Expected

• Link related commits and PRs.
• Include screenshots for UI changes when applicable.
• Include test/build evidence when implementation touches app/runtime code.