Since records in different tenants can have the same ID, they can share the same `cache_key`, and so we need a namespace to differentiate them. Without them, records from one tenant could expire the cache of a record from another tenant.
Since records in different tenants can have the same ID, they can share the same `cache_key`, and so we need a namespace to differentiate them. Without them, records from one tenant could expire the cache of a record from another tenant.