0727e0e8d5
The agent subprocess writes StepNode to CAS on disk, but the parent process had an in-memory cache from createFsStore init. Fix: re-create store after agent spawn to pick up new nodes. Also centralized JSON Schemas in uwf-protocol so cli-uwf and agent-kit produce identical type hashes. E2E smoke test passing: workflow put → thread start → 3x step → done Refs #309