RehearsalServer
The V10 side of the blue-green rehearsal (.1): the 9.x example ported, on the Spring Boot host, its log and snapshots on the PostgreSQL database spring.datasource.* names, the one migrate-data imported the 9.x data into: the host makes its pool of those properties.
Functions
The rehearsal's driver names the tenant it acts in, and the owner a created order or cart belongs to, as the 9.x routes named them in their paths: X-Rehearsal-Tenant and X-Rehearsal-Owner. A request without the tenant is the default tenant's. A caller without an owner is tenant-level: it reaches every order of its tenant, as the 9.x routes of an order did. X-Rehearsal-Region gives the caller the claim REGION, whose orders alone it reaches (orderAccess).
Who reads and changes an order, which declares access attributes: a caller of a region the orders tagged with it, an owner its own, and a tenant-level caller every order of its tenant, as the scope rule had it.