Finalize the integration API definition for multi-device instance drivers. Most messages are already defined, but the payload needs to be finalized and reviewed. - Message flow concept: [Multi Device Instance Driver](https://github.com/unfoldedcircle/core-api/blob/main/doc/integration-driver/multi-device-driver.md) - AsyncAPI definition: tagged with `#multi-device`
Finalize the integration API definition for multi-device instance drivers.
Most messages are already defined, but the payload needs to be finalized and reviewed.
#multi-device