feat: add toJSON() to all streaming events for wire-safe serialization#708

mkmeral merged 5 commits intostrands-agents:mainstrands-agents/sdk-typescript:mainfrom

agent-of-mkmeral:agent-tasks/wire-safe-streaming-eventsagent-of-mkmeral/sdk-typescript:agent-tasks/wire-safe-streaming-eventsCopy head branch name to clipboard