v2.2.67

SDK 2.2.67 adds project-scoped agent model discovery and optional per-message model selection. Runtime carries the corresponding pinned-model execution and turn process cleanup changes.

Model discovery and selection require the matching Cloud and Runtime deployment. Default model and available choices are controlled by the platform. This release does not assert live deployment acceptance; that is tracked separately in the platform release evidence.

Published npm and PyPI artifacts were verified against the local release artifact hashes.