Check instance availability via API

**I want to make sure that the instance is available before actually starting it.**
Especially on scarce instance types (e.g. H100-1520) it could be the case that OVH has no capacities that moment. Other providers usually offer API endpoints to check the availability in realtime.

There are endpoint like /cloud/order/rule/availability or /cloud/project/{serviceName}/capabilities/productAvailability. But they seem to indicate whether an instance is in general available rather than whether it is available right now.

Are there any intentions to support this? Did anybody manage to do those checks?