Resolve DOMAIN_QUESTION — nightly rate source for penalty calculation

[telivity-otaip]

Description

Cancellation penalty should use the booked nightly rate, not a hardcoded value or the current rate.

Status

Resolved — nightlyRate field added to ModificationInput. The caller passes the booked rate from the booking record.

File

packages/agents/lodging/src/hotel-modification/index.ts

Remaining work

• Add test case that verifies penalty is calculated against the booked rate, not the current rate
• Add test case that verifies the fallback behavior when nightlyRate is omitted