fix(claude-agent-sdk): Don't drop tool spans for spawning subagents#1779

Luca Forstner (lforst) merged 8 commits into

mainbraintrustdata/braintrust-sdk-javascript:mainfrom

lforst/claude-agent-tool-spanbraintrustdata/braintrust-sdk-javascript:lforst/claude-agent-tool-spanCopy head branch name to clipboard