Door code editing via API

There's currently no API method to edit or remove a door code on a reservation. This blocks a fraud-prevention workflow that higher-risk operators need.

The use case: for higher-risk units (basement suites, ground-floor access, etc.), we want to gate the door code behind ID verification. The guest verifies, a human signs off, and only then is the code released. To automate the release side, we need to programmatically set or clear the code once verification passes. Without API access, the only workaround is browser automation to edit the code manually, which is slow, brittle, and expensive to run at scale.

Impact: this unlocks verification-gated check-in for any operator managing higher-risk inventory, which is a real safety and liability concern for larger portfolios. Read or write access to the door code field on a reservation would solve it.