FP4 preparation uses model_object_id; adapter_object_id names deprecated

FP4 preparation requests now identify the adapter with model_object_id and model_revision_id. The job still accepts only LoRA adapters, not full-weight models.

The adapter_object_id and adapter_revision_id names are deprecated but still accepted. A request can use either pair, but not both. A job's params list the adapter under both pairs of names, with the same values.

See Prepare for FP4 inference for details.