fix(mcp): forward maxResultSizeChars via _meta to bypass Zod annotation stripping#756

dltn merged 6 commits intoanthropics:mainanthropics/claude-agent-sdk-python:mainfrom

ChristianRyan:fix/mcp-large-output-max-result-size-annotationChristianRyan/claude-agent-sdk-python:fix/mcp-large-output-max-result-size-annotationCopy head branch name to clipboard