v0.4.19

Fix cross-process model result reuse in the workflow CLI. The SDK's modality sets could serialize in different orders and generate different cache keys for identical requests. Cache keys now use canonical modality order and retain reads of existing order-sensitive entries.

Schema repair messages also include nested failure locations without logging rejected input values.

All three release platforms passed the backend checks, neutral report example, packaging and packaged CLI smoke checks. Includes the headless CLI introduced in v0.4.18.

CLI guide

Implementation: #114.