Explicit native ApplyServerPreseed orchestration; never invoked at startup.

Applies at most 128 records in native dependency order under one total deadline. Successful mutations are returned in changes; failures preserve that bounded journal and the native failure/accepted operation response. No rollback, mutation replay, trust generation or host provisioning occurs. This helper configures the host-selected Incus server only when explicitly called by the authorized host. JSON models are normalized like native typed input; ambiguous case aliases are rejected. YAML is not parsed here.