batch_encode_with_cache/batch_encode_prompts take te_batch_size (default 1 =
off, DEFAULT_TE_BATCH_SIZE) and a hidden te_batch_verify; batched prompts are
cached, leftovers take the unchanged per-prompt loop, and the summary line
reports batched prompts/forwards. Builder state default + migration, Run
Settings control, state_to_configs_json emission, orchestrator read, README.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>