feat: YAML workflow definition format with full step type parity#3

Draft

Copilot wants to merge 6 commits intomainfrom

copilot/add-yaml-workflow-definition-loader

Commits on Mar 21, 2026

fix: build catch workflows eagerly, unique parallel branch names, isLeaf fix for composite types, regenerate lock files

Copilot
and
JerrettDavis
committed
fix: conditional branch naming, approval class key, exception type caching, remove unused using, update docs, regenerate lock files

Copilot
and
JerrettDavis
committed