feat(a2a): adopt the standard A2A error envelope - #46

feat(a2a): adopt the standard A2A error envelope#46

Zhoujie628 merged 4 commits into

project-openan:mainproject-openan/workflow-engine-sdk-java:mainfrom

Zhoujie628:feat/a2a-error-envelopeZhoujie628/workflow-engine-sdk-java:feat/a2a-error-envelopeCopy head branch name to clipboard